Mitsubishi Fuso 4M4 Series Diesel Engine Service Manual [PDF]

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Pub.No.TWDE0911, NOVEMBER 2009



Shop Manual diesel engine



diesel engine



Pub.No.TWDE0911 NOVEMBER 2009



Shop Manual



Pub.No.TWDE0911, NOVEMBER 2009



GROUP INDEX GENERAL.......................................... ENGINE ............................................. LUBRICATION................................... FUEL AND ENGINE CONTROL ....... COOLING ..........................................



FOREWORD This Shop Manual is published for the information and guidance of personnel responsible for maintenance of Mitsubishi Fuso 4M4 series diesel engine, and includes procedures for adjustment and maintenance services. We earnestly look forward to seeing that this manual is made full use of in order to perform correct services with no wastage. For more details, please consult your nearest authorized Mitsubishi dealer or distributors. Kindly note that the specifications and maintenance service figures are subject to change without prior notice in line with improvement which will be effected from time to time in the future.



NOVEMBER 2009 Applicable models 4M42T3



©2009 Mitsubishi Fuso Truck & Bus Corporation



INTAKE AND EXHAUST ................... EMISSION CONTROL....................... HYBRID ELECTRIC VEHICLE SYSTEM ............................................



00 11 12 13 14 15 17 18



This Shop Manual contains the information classified into the following groups. If any system or equipment has two or more variations with significantly different construction, the variations are handled as different groups. These groups are identified by different alphabets preceded by the same number. 1. ENGINE volume Group No.



Group subject



11



ENGINE



12



LUBRICATION



13



FUEL AND ENGINE CONTROL



14



COOLING



15



INTAKE AND EXHAUST



17



EMISSION CONTROL



18



HYBRID ELECTRIC VEHICLE SYSTEM



2. CHASSIS volume Group No.



Group subject



21



CLUTCH



22



MANUAL TRANSMISSION



22E



INOMAT-II



25



PROPELLER SHAFT



26



FRONT AXLE



27



REAR AXLE



31



WHEEL, TIRE



33



FRONT SUSPENSION



34



REAR SUSPENSION



35



BRAKE



35EA



POWER ANTI-LOCK BRAKE SYSTEM



35EB



HILL START ASSIST SYSTEM



36



PARKING BRAKE



37



STEERING



41



BUMPER, FRAME



42



CAB MOUNTING, TILT



43



DOOR



51



EXTERIOR



52



INTERIOR



55



HEATER, AIR-CONDITIONER



3. ELECTRICAL volume Group No. 54



Group subject ELECTRICAL



GROUP 00 GENERAL MODIFICATION SUMMARY ............................................................. 00-2 VEHICLE MODEL CODING SYSTEM .............................................. 00-4 EQUIPMENT TYPE CODING SYSTEM ............................................ 00-6 POWER TRAIN TABLE .................................................................... 00-7 HOW TO READ THIS MANUAL ....................................................... 00-8



13A 13E



CHASSIS NUMBER, ENGINE NUMBER, MOTOR NUMBER AND NAME PLATE ......................................................................... 00-16 PRECAUTIONS FOR MAINTENANCE OPERATION .................... 00-18 JACKING UP THE VEHICLE .......................................................... 00-28 DIAGNOSIS CODES 1. Diagnosis Codes ...................................................................... 00-30 2. Reading and Erasing the Diagnosis Code ................................. 00-31



TABLE OF STANDARD TIGHTENING TORQUES ........................ 00-36



00-1



MODIFICATION SUMMARY 1. Characteristics of and Precautions for the ECO HYBRID Model • The following are added to the characteristics of the CANTER ECO HYBRID. • The CANTER ECO HYBRID is equipped with a dedicated high voltage battery (350 V) for the hybrid electric vehicle system aside from the 24 V battery. • High voltage is cut off when the starter switch is OFF and the vehicle is stationary. • High voltage is generated in the high voltage circuit when the starter switch is ON or when the gear is engaged and the wheels are rotating. • High voltage in the high voltage circuit may be generated irrespective of the vehicle condition during the hybrid electric vehicle system abnormalities (the hybrid electric vehicle warning lamp illuminates). • Be sure to observe the regulations of your country or region regarding the qualifications or trainings required for servicing the high-voltage equipment. • The following are added to the precautions concerning high voltage cable and high voltage devices.



DANGER • High voltage (350 V) may be generated in the high voltage circuit that consists of various high voltage devices (motor generator, motor electronic control unit and high voltage battery box) and cable (orange). Utmost care is required in handling these parts. When servicing, see Gr18 HYBRID ELECTRIC VEHICLE SYSTEM. • Improper use of the high voltage battery may cause electric shock, overheating or fire though it is safe when properly handled. It may explode in the worst case. • The following are added to the remedies against vehicle damage by collision or the like.



WARNING • When the vehicle is on fire, use the ABC fire extinguisher to put out the fire. Since it is dangerous to fight a fire with a small quantity of water, spray a large amount of water from a fire hydrant or wait for the arrival of the fire brigade. • When the vehicle is soaked in water, do not touch the high voltage devices and high voltage cable including the safety plug of the high voltage battery box to prevent electric shock. Work on the vehicle after pulling it out of water. • Insulate any high voltage terminal that is exposed by damage with vinyl tape or the like to prevent electric shock.



CAUTION • The electrolyte in the high voltage battery is as flammable as kerosene. If there is any fluid leakage near the high voltage box, wipe up the fluid while keeping fire away from it. • Turn the starter switch to OFF to cut off the high voltage system. If it cannot be confirmed that the starter switch is OFF, disconnect the negative side battery cable from the 24 V battery. Then, remove the safety plug of the high voltage battery box with insulated gloves on while referring to Gr18 HYBRID ELECTRIC VEHICLE SYSTEM. • In the case of the abnormality described above, replace the defective part referring to Gr18 HYBRID ELECTRIC VEHICLE SYSTEM.



00-2



00 M E M O



00-3



VEHICLE MODEL CODING SYSTEM



1 2 3 4 5 6 7 8 9 10 11



F E 8 4 B E V 3 H 6 EX 1



Basic vehicle type



F



2



Load capacity, drive system



E



2 ton class and over, 4 × 2



3



Cab type



8



Wide cab



4



Suspension



4



Independent axle



5



Engine



B



4M42T



6



Wheelbase



E



3350 mm



7



Chassis arrangement for use



V



Van use



8



Rear tire arrangement, payload



3



Low deck/rear double Payload 3000 to 4000 kg



9



Vehicle specification



H



Hybrid



10



Engine output variation



6



4M42T3 (96 kW {130 PS})



11



Export specification



00-4



EX



Cab-over engine truck



00



1 2 3 4 5 6 7 8 9 10 11



F E 8 4 B E V 7 R FA H 1



Basic vehicle type



F



Cab-over engine truck



2



Load capacity, drive system



E



2 ton class and over, 4 × 2



3



Cab type



8



Wide cab



4



Suspension



4



Independent axle



5



Engine



B



4M42T



6



Wheelbase



E



3350 mm



7



Chassis arrangement for use



V



Van use



8



Rear tire arrangement, payload



7



Rear double Payload 3000 to 4000 kg



9



Steering position



R



Right-hand drive vehicle



10



Export specification



FA



11



Vehicle specification



H



Hybrid



00-5



EQUIPMENT TYPE CODING SYSTEM Component



Name plate marking



Code description



Engine 4M42T3



4



M



4



2



T



3 Classification of turbocharger Turbocharged Order of development within same series Order of development among different series Diesel engine No. of cylinders (4)



Clutch C3W28



C



3



W



28 Disc outside diameter Facing material (W: Woven) Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the clutch



Transmission M036S5



M



036



S



5 Forward speeds Type of mesh (S: Synchromesh) Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the transmission



Propeller shaft P3



P



3 Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the propeller shaft



Front axle F200T



F



200



T Vehicle type (T: Truck) Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the front axle



Rear axle R033T



R



03



3



T Vehicle type (T: Truck) Order of development within same series Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the rear axle



Reduction and differentioal D033H



D



03



3



H Tooth profile (H: Hypoid gear) Order of development within same series Load carrying capacity of truck class (ton nage) on which the clutch is primarily used Initial letter of the reduction & differentioal



00-6



00



POWER TRAIN TABLE Vehicle model



Engine



Clutch



Transmission



Propeller shaft



Rear axle



Reduction and differential



FE84BEV3H6EX



4M42T3



C3W28



M036S5



P3



R033T



D033H



FE84BEV7RFAH



4M42T3



C3W28



M036S5



P3



R033T



D033H



00-7



HOW TO READ THIS MANUAL This manual consists of the following parts: • Specifications • Structure and Operation • Troubleshooting • On-vehicle Inspection and Adjustment • Service procedures On-vehicle Inspection and Adjustment • Procedures for inspection and adjustment of individual parts and assemblies as mounted on the vehicle are described including specific items to check and adjust. Specified or otherwise, inspection should be performed for looseness, play, backlash, crack, damage, etc. Service procedures • Procedures for servicing components and parts off the vehicle are described centering on key points in their removal, installation, disassembly, reassembly, inspection, etc. Inspection • Check items subject to “acceptable/unacceptable” judgement on the basis of service standards are all given. • Some routine visual checks and cleaning of some reused parts are not described but must always be included in actual service work. Caution • This service manual contains important cautionary instructions and supplementary information under the following four headings which identify the nature of the instructions and information:



DANGER



Precautions that should be taken in handling potentially dangerous substances such as battery fluid and coolant additives.



WARNING



Precautionary instructions, which, if not observed, could result in serious injury or death.



CAUTION



Precautionary instructions, which, if not observed, could result in damage to or destruction of equipment or parts.



NOTE



Suggestions or supplementary information for more efficient use of equipment or better understandings.



Terms and Units • Front and rear The forward running direction of the vehicle is referred to as the front and the reverse running direction is referred to as the rear. • Left and right Left hand side and right hand side, when facing the forward running direction of the vehicle, are respectively left and right. Standard value • Standard value dimensions in designs indicating: the design dimensions of individual parts, the standard clearance between two parts when assembled, and the standard value for an assembly part, as the case may be. Limit • When the value of a part exceeds this, it is no longer serviceable in respect of performance and strength and must be replaced or repaired.



00-8



00 Tightening torque • Values are directly specified for out-of-standard tightening torques for bolts and nuts. • Where there is no specified figure for tightening torque, follow the table covering standard tightening torques. (Values for standard tightening torques are based on thread size and material.) • When the item is to be tightened in a wet state, “wet” is indicated. Where there is no indication, read it as dry. Units • Tightening torques and other parameters are given in SI* units with metric units added in brackets { }. *SI: Le Système International d’Unités Example: 390 N·m {40 kgf·m} Metric unit SI unit Item Force Moment of force Positive pressure Pressure



Vacuum pressure



SI unit {metric unit}



Conversion factor



N {kgf}



9.80665 N {1 kgf}



N·m {kgf·m}



9.80665 N·m {1 kgf·m}



kPa {kgf/cm2}



98.0665 kPa {1 kgf/cm2}



kPa {mmHg}



0.133322 kPa {1 mmHg}



Pa {mmH2O}



9.80665 Pa {1 mmH2O}



Volume



dm3 {L}



1 dm3 {1 L}



Heat quantity



J {kcal}



4186.05 J {1 kcal}



W {kcal/h}



1.16279 W {1 kcal/h}



kW {PS}



0.7355 kW {1 PS}



Heat flow Power



00-9



HOW TO READ THIS MANUAL 1. Illustrated Parts Breakdown and Service Procedures Symbol



*a



00-10



Denotation



Application



Remarks Specified values shown in table See Table of Standard Tightening Torques for parts for which no tightening torques are specified.



Tightening torque



Parts not tightened to standard torques (standard torques specified where necessary for servicing)



Locating pin



Parts to be positioned for installation



Non-reusable parts



Parts not to be reused



Lubricant and/or sealant



Parts to be coated with lubricant or sealant for assembly or installation



Special tool



Parts for which special tools are required for Tool name/shape and part number are shown in service operation table.



Associated part



Parts associated with those removed/disassembled for servicing



Necessary lubricant and/or sealant, quantity required, etc. are specified in table.



00



00-11



HOW TO READ THIS MANUAL 2. How to Use Diagnosis Codes There are the diagnosis code and message displayed on Multi-Use Tester. Numerical values in parenthesis are added only when a diagnostic code indicated in the Multi-Use Tester display differs from the code indicated by the number of warning lamp flashes.



P0475: Exhaust Brake PWR (Open) (warning lamp flashes: 93) Generation condition Recoverability



Control effected by electronic control unit



Exhaust shutter 3-Way magnetic valve circuit is open System recovers if any valid signal is input when starter switch is turned from OFF to ON (the warning lamp does not extinguish unless 3 consecutive valid signals are input). Control of auxiliary brake function is deactivated. White smoke reduction control is deactivated if idling condition is held for an extended period of time.



Service data



C2: Auxiliary brake M/V1



Actuator test



AA: Auxiliary brake M/V1



Inspection Electronic control unit



: Exhaust shutter 3-Way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-Way magnetic valve



Electric circuit diagram



Exhaust shutter 3-Way magnetic valve circuit



Refer to Inspection of Electrical Equipment.



Refer to Electric Circuit Diagram.



Refer to Inspections Performed At Electronic Control Unit Connectors.



Refer to Actuator Tests Performed Using Multi-Use Tester.



Refer to Multi-Use Tester Service Data.



00-12



00 3. How to Read Circuits



00-13



HOW TO READ THIS MANUAL 3.1 Index number: 100 to 999 • Index numbers are used as reference numbers for electrical circuits. Each electrical circuit has been assigned its own index number.



3.2 Key number: A01 to Z99 • Key numbers indicate electrical equipment installation locations. The installation location of a part can be easily found using its key number shown in a circuit diagram. All of the electrical equipment installation locations are listed in Gr54-10.



3.3 Part name 3.4 Connector type (type indication) • A list of the connectors used is included in Gr54-14.



3.5 Connector terminal number



3.6 Major harness division • Major harness divisions are shown.



3.7 Wiring variations between different specifications • Variations in wiring/circuit between different vehicle specifications are clearly indicated as shown.



3.8 Code number: #001 to #999 • Code numbers are reference numbers to find individual electrical equipment inspection procedures. The inspection procedure for a electrical equipment can be found using its code number shown in a circuit diagram.



3.9 Grounding point: [1] to [99] • Locations where wires are grounded to the vehicle. All of the grounding points are listed in 130 .



3.10 Harness connection • The arrow in the wiring diagram indicates where harnesses are connected, and NOT the flow of electricity.



3.11 Circuit number, wire diameter, wire color



00-14



00 (1) Wire color Wire color



Base color + tracer



B



Black BW



Black/ BY white



Black/ BR yellow



Black/red BG



Br



Brown BrW



Brown/ BrB white



Brown/ BrY black



G



Green GW



Green/ GR white



Green/ GY red



Gr, Gy



Gray



GrL, GyL



Gray/ GrR, blue GyR



L



Blue LW



Blue/ LR white



Lg



Light LgR green



Light green/ LgY red



Black/ BL green



Black/ blue



Brown/ BrR yellow



Brown/ BrG red



Brown/ green



Green/ GB yellow



Green/ GL black



Green/ GO blue



Green/ orange



Blue/ LB yellow



Blue/ LO black



Blue/ LG orange



Blue/ green



Red/blue RO



Red/ orange



Gray/ red Blue/red LY Light green/ LgB yellow



O



Orange OL



Orange/ OB blue



P



Pink PB



Pink/ PG black



Pink/ PL green



Pink/ PW blue



Red/ RB white



Red/ RY black



Red/ RG yellow



Pu R Sb



Orange/ OG black



Light green/ LgW black



Light green/ white



Orange/ green Pink/ white



Purple Red RW



Red/ RL green



Sky blue



V



Violet VY



Violet/ VW yellow



Violet/ VR white



Violet/red VG



W



White WR



White/ WB red



White/ WL black



White/ WG blue



White/ WO green



White/ orange



YR



Yellow/ YB red



Yellow/ YG black



Yellow/ YL green



Yellow/ YW blue



Yellow/ YO white



YP



Yellow/ YV pink



Yellow/ violet



Y



Yellow



Violet/ green



Yellow/ orange



00-15



CHASSIS NUMBER, ENGINE NUMBER, MOTOR NUMBER AND NAME PLATE • Serial chassis and engine numbers are assigned to the vehicles and engines in manufacturing sequence. Every vehicle and engine has its own number. These numbers are required for registration and related inspection of the vehicle. Chassis number



• The chassis number is indicated on the left frame, near the left front wheel. Example: FE84BE – A Chassis number Vehicle number



• The chassis number is included in the vehicle identification number (V.I.N), which is stamped on the left-hand frame near the left front wheel. Example: JLF FE84BE0K J Chassis number Vehicle number



Engine number • The engine number is indicated on the right side of the crankcase. Example: 4M42 – Engine number Engine model



Motor number • The motor number is indicated on the left below part of the clutch housing. Example: S10B12345



00-16



00 Name plate



• Name plate contains the following information. • MODEL • Chassis number • Engine number • Wheel base



• Vehicle compliance and date plate are attached to the assistant driver’s side door opening. The compliance plate certifies that your vehicle complied with Australian Design Rules at the time of manufacture. In all correspondence related to your vehicle the following information should be quoted. • The engine number. • The vehicle identification number (V.I.N.) – shown on compliance plate. • The S.O.A. No. (where applicable), option code, paint and trim codes located on date plate.



00-17



PRECAUTIONS FOR MAINTENANCE OPERATION • Before performing service operations, inquire into the customer’s complaints and ascertain the conditions by checking the total distance traveled, the conditions under which the vehicle is operated, and other relevant factors about the vehicle. And note the necessary information. This information will help you to service the vehicle efficiently. • Check the location of the fault, and identify its cause. Based on your findings, determine whether parts must be removed or disassembled. Then, follow the service procedure given in this manual. • Perform service operations on a level surface. Before starting, take the following preparatory steps: • To prevent soiling and damage, place covers over the seats, trim and floor in the cab and over the paintwork of the body.



• Prepare all the general and special tools necessary for the job.



WARNING • Special tools must be used wherever specified in this manual. Do not attempt to use other tools since they could cause injuries and/or vehicle damage.



• After manually tilting the cab, be sure to engage the stopper with the lock lever to secure the cab stay in a rigid state.



• Take extreme care when removing/installing heavy items such as engine, transmission and axle. When lifting heavy items using a cable etc., observe the following precautions. • Identify the mass of the item being lifted. Use a cable that is strong enough to support the mass. • When lifting the engine, always use the engine hanger.



00-18



00 • If lifting eyes are not provided on the item being lifted, tie a cable around the item taking into account the item’s center of gravity.



• Do not allow anyone to pass or stay under a lifted item that may fall.



• Never work in shoes that have oily soles. When working with a partner or in a group, use pre-arranged signals and pay constant attention to safety. Be careful not to touch switches and levers unintentionally.



• Inspect for oil leakage etc. before washing the vehicle. If the order is reversed, any oil leakage or fault that may exist could go unnoticed during inspection.



• Prepare replacement parts ready for installation.



00-19



PRECAUTIONS FOR MAINTENANCE OPERATION • Oil seals, packings, O-rings and other rubber parts, gaskets, and split pins must be replaced with new ones after removal. Use only genuine MITSUBISHI replacement parts.



• When disassembling parts, visually check them for wear, cracks, damage, deformation, deterioration, rust, corrosion, defective rotation, fatigue, clogging and any other possible defect.



• To facilitate correct reassembly of parts, make alignment marks on them before disassembly and arrange disassembled parts neatly. Make punch marks and other alignment marks where they will not detract from parts’ functionality and appearance. • After removing parts from the vehicle, cover the area to keep it free of dust.



CAUTION • Be careful not to mix up identical parts, similar parts and parts that have left/right alignments. • Keep new replacement parts and original (removed) parts separately. • Apply the specified oil or grease to U-seals, oil seals, dust seals and bearings before reassembly. • Always use the specified oils and greases when performing inspection or replacement. Immediately wipe away any excess oil or grease with a rag.



• Wear safety goggles when using a grinder or welder. Wear gloves when necessary, and watch out for sharp edges and other items that might wound your hands.



00-20



00 • Before working on the electrical system, disconnect the (–) battery cable to prevent short circuits.



CAUTION • Make sure the starter switch and lighting switches are OFF before disconnecting or connecting battery cable. Semiconductor components may otherwise be damaged.



• Carefully handle sensors relays, and other items that are sensitive to shock and heat. Do not remove or paint the cover of any control unit.



• When applying a voltage to a part for inspection purposes, check that the (+) and (–) cables are connected properly then gradually increase the voltage from zero. Do not exceed the specified voltage. Remember that control units and sensors do not necessarily operate on the battery voltage.



• When separating connectors, grasp the connectors themselves rather than the harnesses. • To separate locking connectors, first push them in the direction of the arrows. To reconnect locking connectors, push them together until they click.



• Before washing the vehicle, cover electrical parts to keep them dry. (Use plastic sheets or the like.) Keep water away from harness connectors and sensors and immediately wipe off any water that gets on them.



00-21



PRECAUTIONS FOR MAINTENANCE OPERATION 1. Handling Precautions for Electric Circuits CAUTION • Do not pierce wire insulation with test probes or alligator clips when performing electrical inspections. Doing so can, particularly with the chassis harness, hasten corrosion.



1.1 Inspection of harnesses (2) Inspections with connectors fitted together (2.1) Waterproof connectors • Connect an inspection harness and connector A between the connectors B of the circuit to be inspected. Perform the inspection by applying a test probe C to the connectors of the inspection harness. Do not insert the test probe C into the wire-entry sides of the waterproof connectors since this would damage their waterproof seals and lead to rust.



(2.2) Non-waterproof connectors • Perform the inspection by inserting a test probe C into the wireentry sides of the connectors. An extra-narrow probe is required for control unit connectors, which are smaller than other types of connector. Do not force a regular-size probe into control unit connectors since this would cause damage.



(3) Inspections with connectors separated (3.1) Inspections on female terminals • Perform the inspection by carefully inserting a test probe into the terminals. Do not force the test probe into the terminals since this could deform them and cause poor connections.



(3.2) Inspections on male terminals • Perform the inspection by applying test probes directly to the pins. .



CAUTION • Be careful not to short-circuit pins together with the test probes. With control unit connectors, short-circuiting of pins can cause damage to the control unit’s internal circuitry.



00-22



00 • When using a multimeter to check continuity, do not allow the test probes to touch the wrong terminals.



1.2 Inspection of connectors (1) Visual inspection • Check that the connectors are fitted together securely.



• Check whether wires have been separated from their terminals due to pulling of the harness.



• Check that male and female terminals fit together tightly.



• Check for defective connections caused by loose terminals, by rust on terminals, or by contamination of terminals by foreign substances. (2) Checking for loose terminals • If connector terminal retainers become damaged, male and female terminals may not mate with each other when the connector bodies are fitted together. To check for such terminals, gently pull each wire and see whether any terminals slip out of their connector housings.



00-23



PRECAUTIONS FOR MAINTENANCE OPERATION 1.3 Inspections when a fuse blows • Remove the fuse, then measure the resistance between ground and the fuse’s load side. Next, close the switch of each circuit connected to the fuse. If the resistance measurement between any switch and ground is zero, there is a short circuit between the switch and the load. If the resistance measurement is not zero, the circuit is not currently short-circuited; the fuse probably blew due to a momentary short circuit. • The main causes of short circuits are as follows: • Harnesses trapped between chassis parts • Harness insulation damage due to friction or heat • Moisture in connectors or circuitry • Human error (accidental short-circuiting of components)



1.4 Inspection of chassis ground • A special ground bolt is used to tighten a ground terminal. When servicing the ground point, be sure to follow the procedures described below: • When reinstalling the ground bolt Tighten the ground bolt to the specified torque. • When relocating the ground point A special ground bolt must be used. Spot-weld a nut to a frame and tighten the ground bolt to the specified torque. Be sure to apply touch-up paint to the welded point.



2. Service Precautions for Alternators • When servicing alternators, observe the following precautions: • Never reverse the polarity of battery connections. If the polarity of the battery connections were to be reversed, a large current would flow from the battery to the alternator, damaging the diodes and regulator.



• Never disconnect the battery cables with the engine running. Disconnection of the battery cables during engine operation would cause a surge voltage, leading to deterioration of the diodes and regulator.



00-24



00 • Never perform inspections using a high-voltage multimeter. The use of a high-voltage multimeter could damage the diodes and regulator.



• Keep alternators dry. Water on alternators can cause internal short circuits and damage.



• Never operate an alternator with the B and L terminals short-circuited. Operation with the B and L terminals connected together would damage the diode trio.



• Disconnect the battery cables before quick-charging the battery with a quick charger. Unless the battery cables are disconnected, quick-charging can damage the diodes and regulator.



00-25



PRECAUTIONS FOR MAINTENANCE OPERATION 3. Intermittent Faults • An intermittent fault typically occurs only under certain operating conditions. Once these conditions have been identified, the cause of the intermittent fault can be ascertained easily. First, ask the customer about the vehicle operating conditions and weather conditions under which the fault occurs. Also ask about the frequency with which the fault occurs and about the fault symptoms. Then, reproduce the fault based on this information. In accordance with the conditions under which the fault occurs, determine whether the fault is caused by vibration, heat or other factors. if vibration is a possible factor, see if the fault can be reproduced by performing the following checks on individual connectors and other parts: • Gently move connectors up and down and to left and right. • Gently move wiring harnesses up and down and to left and right. • Gently wiggle sensors and other devices by hand. • Gently wiggle wiring harnesses on suspension systems and other moving parts. • Connectors and other parts to be checked are those included or given as likely fault locations in inspection procedures corresponding to diagnosis codes and/or fault symptoms.



00-26



00 4. Precautions for Arc Welding • When arc welding is performed, current from the welder flows to ground via the vehicle’s metal parts. Unless appropriate steps are taken, this current can damage control units, other electrical devices and wiring harnesses. And any electrical device near the point on the vehicle to which the (–) cable of the welder is connected, might be largely damaged.



• Current flows backward as shown below.



4.1 From battery (–) cable To prevent damage to the battery and to electrical devices that are connected directly to the battery, it is essential to disconnect the battery’s (–) cable.



4.2 Procedure • Turn the starter switch to the LOCK position. • Disconnect the battery’s (–) cable. • Remove the safety plug of the high voltage battery box referring to Gr18 HYBRID ELECTRIC VEHICLE SYSTEM. • Cover all parts of the vehicle that may be damaged by welding sparks. • Connect the welder’s (–) cable to the vehicle as close as possible to the area being welded. Do not connect the welder’s (–) cable to the cab if the frame is being welded, and vice versa. • Set the welding current in accordance with the part being welded.



5. Maintenance for Trucks with Airbags • For maintenance of SRS airbags and seat belts with pretensioners, work should be conducted safely by following the work procedure and precautions.



6. Precautions When Starting the Engine • The engine warning lamp may illuminate if the starter switch is kept turned to the START position for a while with the gear engaged. (Diagnosis code P0016 “No SNSR Offset/Backup Mode” of the engine electronic control unit occurs.) • If the engine warning lamp illuminated, place the transmission in neutral and turn the starter switch from OFF to ON four times to turn off the warning lamp.



00-27



JACKING UP THE VEHICLE



Jacking up procedure 1 Apply chocks to the rear wheels. 2 Raise the front of the vehicle using a bottle jack or garage jack. 3 Place rigid racks to support the frame on the front side of the vehicle.



WARNING • Apply chocks to the rear wheels to hold the vehicle in place. • Do not remove the chocks until service operations are finished. • It is extremely dangerous to support the vehicle with a bottle jack or garage jack alone. Use rigid racks additionally to support the frame on the front side of the vehicle. • Leave the bottle jack or garage jack and rigid racks in place until all service operations are completed. Be sure not to remove them during work.



00-28



00



Jacking up procedure 1 Apply chocks to the front wheels. 2 Raise the rear of the vehicle using a bottle jack or garage jack. 3 Place rigid racks to support the frame on both sides of the vehicle.



WARNING • Apply chocks to the front wheels to hold the vehicle in place. • Do not remove the chocks until service operations are finished. • It is extremely dangerous to support the vehicle with a bottle jack or garage jack alone. Use rigid racks additionally to support the frame on both sides of the vehicle. • Leave the bottle jack or garage jack and rigid racks in place until all service operations are completed. Be sure not to remove them during work.



00-29



DIAGNOSIS CODES 1. Diagnosis Codes • Diagnosis codes indicate the faulty sections of the vehicle. • A fault can be repaired by reading out the diagnosis code(s) stored in the control unit and performing the remedy for that code(s). • Diagnosis codes can be displayed in the following two methods. Select either of them according to the system to be diagnosed. • Using a Multi-Use Tester • Using flashing of a warning lamp on meter cluster • The table below indicates the systems for which diagnosis codes can be displayed and the methods usable for individual systems.



1.1 Systems and diagnosis code displaying methods Warning lamp



System



Diagnosis codes displaying methods Multi-Use Tester



Flashing of warning lamp



Common rail



13



Turbo charger Diesel particulate filter Exhaust gas recirculation



15 O



O



Starter continuous energizing preventing function O



O



18



O (Gear shift indicator indication)



O



22E



Power anti-lock brake system



O



O



35EA



Hill start assist system



O



O



35EB



SRS airbag



O



–



52



INOMAT-II



(ORANGE)



17 54



Pre-heat control Hybrid electric vehicle system



Reference Gr



1.2 Types of diagnosis codes (1) Present diagnosis code • Fault developed in the vehicle after the starter switch is set to ON is indicated by corresponding diagnosis code. • The fault warning lamp is lit at the same time. (2) Past diagnosis code • Past fault developed in the vehicle is indicated by corresponding diagnosis code stored in the memory of the electronic control unit. • With the vehicle restored to its normal condition or the starter switch turned from OFF to ON after inspection or repair against present diagnosis codes, the present diagnosis code is stored as past diagnosis codes in the memory of the electronic control unit. • When reading out the past diagnosis codes, the warning lamp does not illuminate as such codes do not indicate the current fault.



00-30



00 2. Reading and Erasing the Diagnosis Code 2.1 Using a Multi-Use Tester (1) Connecting a Multi-Use Tester



Special tools Mark



Tool name and shape



SOFTWARE DISC



Multi-Use Tester-III SOFTWARE DISC



V.C.I.



Multi-Use Tester test Harness E A: Harness for inspection and drive recorder B: Harness for drive recorder C: Drive recorder harness D: Cigarette lighter plug harness



Part No.



Application



FMS-E09-2* (Multi-Use Tester-III version)



*Installation of the Multi-Use Tester-III or version-up of the current version into Multi-Use Tester-III SOFTWARE DISC (Pub. No. SG0901A)



MH062927



Data transmission between electronic control unit and PC



MH063659 A: MH063661 B: MH063663 C: MH063665 D: MH063666



Power supply to V.C.I. and communication with electronic control unit



Multi-Use Tester test harness D (used for extension)



MH062951



Multi-Use Tester test harness B extension



USB cable



MH063668



Communication between V.C.I. and PC



00-31



DIAGNOSIS CODES (1.1) To perform system inspection • Move the starter switch to the LOCK position. • Connect PC installed , , -A and as shown. • Connect -A connector to the Multi-Use Tester connector on the vehicle.



(1.2) To use drive recorder function • Move the starter switch to the LOCK position. • Connect PC installed , , -A, -C, -D and as shown. • Connect -C connector to the Multi-Use Tester connector on the vehicle. • Connect the cigarette lighter plug of -D to the cigarette lighter socket on the vehicle.



(1.3) To extend the Multi-Use Tester test harness • Connect to -A to extend the test harness to use the Multi-Use Tester outside the vehicle.



00-32



00 (2) Access of diagnosis code • Set the starter switch to ON. • Operate the Multi-Use Tester for a display of necessary diagnosis code stored in the memory of the electronic control unit and identify the location of the fault. (3) Clearing of diagnosis code • Set the starter switch to ON (the engine not to be started). • Operate the Multi-Use Tester to delete all the diagnosis codes stored in the memory of the electronic control unit.



2.2 Using flashing of a warning lamp on meter cluster (1) Engine control, Power anti-lock brake system, Hill start assist system, Hybrid electric vehicle system • Using the diagnosis and memory clear switches, display diagnosis codes. • Diagnosis codes of the battery electronic control unit are sent to the motor electronic control unit and are displayed along with those of the motor electronic control unit by the diagnosis switch operation. However, some diagnosis codes (minor faults) can be checked only with the Multi-Use Tester.



CAUTION • Opening the memory clear switch followed by its reconnection will erase the stored diagnosis codes from the memory. To avoid inadvertently erasing necessary codes, be sure to read well the procedure described below before handling diagnosis codes.



00-33



DIAGNOSIS CODES (1.1) Reading diagnosis codes • To read a diagnosis code, observe how may times the warning lamp flashes and how long each illumination lasts. • The duration of illumination differs between the first and second digits. • Second digit: 1.2 sec. • First digit: 0.4 sec. • A diagnosis code consists of the flashing of second digit and the flashing of first digit in that order. If a diagnosis code has “0” in the second digit, only the first digit will be displayed. • The diagnosis code 01 will be displayed if the system is normal. • The same diagnosis code will be displayed 3 times in a row before moving to the display of the next code. • After the last diagnosis code is displayed, the first code will be displayed again 3 times in a row and then the subsequent codes. This will be repeated.



(1.2) Present diagnosis codes • Turn the starter switch ON. • Remove the diagnosis switch. • Present diagnosis codes will be displayed by flashing of the warning lamp. • When the diagnosis switch is connected, electronic control unit will stop (terminate) displaying diagnosis codes.



(1.3) Present and past diagnosis codes • Turn the starter switch to the ON position. • Open the diagnosis switch. • Present diagnosis codes will be displayed by flashing of the warning lamp. • Open the memory clear switch. • Present and past diagnosis codes will be displayed by flashing of the warning lamp. • Turn the starter switch to the OFF position and connect the memory clear switch and diagnosis switch to terminate the diagnosis code displaying mode. (1.4) Erasing diagnosis codes • Turn the starter switch to the ON position (do not start the engine). • Open the memory clear switch and reconnect it; all diagnosis codes stored in electronic control unit memory will be erased. To cancel diagnosis code erasure after opening the memory clear switch, turn the starter switch to the OFF position and then reconnect the memory clear switch. • Erase the diagnosis codes stored in the battery electronic control unit using the Multi-Use Tester.



00-34



00 (2) INOMAT-II • Display diagnosis codes using the diagnosis switch and memory clear switch.



NOTE • Diagnosis codes are erased by disconnecting and connecting operation of the memory clear switch. Fully understand the procedures before working.



(2.1) Reading diagnosis codes • To read a diagnosis code, check the indication of the gear shift indicator. Example:If the codes are 12 and 34, they will be displayed as shown in the drawing. • If the system is normal, the diagnosis code 01 will be displayed. • Diagnosis codes will be displayed each code once in the reverse chronological order. • After the last diagnosis code is displayed, the first code will be displayed again and then the subsequent codes. This will be repeated. (2.2) Present diagnosis codes • Turn the starter switch to ON. • Disconnect the diagnosis switch. • The present diagnosis codes will be displayed on the gear shift indicator. • When the diagnosis switch is connected, ECU will stop (terminate) displaying diagnosis codes. (2.3) Present and past diagnosis codes • Turn the starter switch to ON. • Disconnect the diagnosis switch. • The present diagnosis codes will be displayed on the gear shift indicator. • Disconnect the memory clear switch. • The present and past diagnosis codes will be displayed on the gear shift indicator. • After the starter switch is turned to OFF, connect the memory clear switch and diagnosis switch to terminate the operation. (2.4) Erasing diagnosis codes • Turn the starter switch to ON. (Do not start the engine.) • All diagnosis codes stored in the electronic control unit can be erased by disconnecting the memory clear switch and then connecting it again. If you discontinue the operation after the memory clear switch is disconnected, turn the starter switch to OFF and then connect the memory clear switch.



00-35



TABLE OF STANDARD TIGHTENING TORQUES • Use specified bolts and nuts. Tighten them to the torques shown below as appropriate, unless otherwise specified. • Threads and bearing surfaces shall be dry. • If the mating nut and bolt (or stud bolt) are different in level of strength, tighten them to the torque specified for the bolt.



Hexagon Head Bolts and Stud Bolts (Unit: N·m {kgf·m}) Strength 4T 7T



8T



Identification symbol Nominal diameter



(stud)



(stud)



(stud)



M5



2 to 3 {0.2 to 0.3}



–



4 to 6 {0.4 to 0.6}



–



5 to 7 {0.5 to 0.7}



–



M6



4 to 6 {0.4 to 0.6}



–



7 to 10 {0.7 to 1.0}



–



8 to 12 {0.8 to 1.2}



–



M8



9 to 13 {0.9 to 1.3}



–



16 to 24 {1.7 to 2.5}



–



19 to 28 {2.0 to 2.9}



–



M10



18 to 27 {1.8 to 2.7}



17 to 25 {1.8 to 2.6}



34 to 50 {3.5 to 5.1}



32 to 48 {3.3 to 4.9}



45 to 60 {4.5 to 6.0}



37 to 55 {3.8 to 5.7}



M12



34 to 50 {3.4 to 5.1}



31 to 45 {3.1 to 4.6}



70 to 90 {7.0 to 9.5}



65 to 85 {6.5 to 8.5}



80 to 105 {8.5 to 11}



75 to 95 {7.5 to 10}



M14



60 to 80 {6.0 to 8.0}



55 to 75 {5.5 to 7.5}



110 to 150 {11 to 15}



100 to 140 {11 to 14}



130 to 170 {13 to 17}



120 to 160 {12 to 16}



M16



90 to 120 {9 to 12}



90 to 110 {9 to 11}



170 to 220 {17 to 23}



160 to 210 {16 to 21}



200 to 260 {20 to 27}



190 to 240 {19 to 25}



M18



130 to 170 {14 to 18}



120 to 150 {12 to 16}



250 to 330 {25 to 33}



220 to 290 {23 to 30}



290 to 380 {30 to 39}



250 to 340 {26 to 35}



M20



180 to 240 {19 to 25}



170 to 220 {17 to 22}



340 to 460 {35 to 47}



310 to 410 {32 to 42}



400 to 530 {41 to 55}



360 to 480 {37 to 49}



M22



250 to 330 {25 to 33}



230 to 300 {23 to 30}



460 to 620 {47 to 63}



420 to 560 {43 to 57}



540 to 720 {55 to 73}



490 to 650 {50 to 67}



M24



320 to 430 {33 to 44}



290 to 380 {29 to 39}



600 to 810 {62 to 83}



540 to 720 {55 to 73}



700 to 940 {72 to 96}



620 to 830 {63 to 85}



Hexagon Head Flange Bolts (Unit: N·m {kgf·m}) Strength 4T



7T



8T



Identification symbol Nominal diameter



M6



4 to 6 {0.4 to 0.6}



–



8 to 12 {0.8 to 1.2}



–



10 to 14 {1.0 to 1.4}



–



M8



10 to 15 {1.0 to 1.5}



–



19 to 28 {2.0 to 2.9}



–



22 to 33 {2.3 to 3.3}



–



M10



21 to 31 {2.1 to 3.1}



20 to 29 {2.0 to 3.0}



45 to 55 {4.5 to 5.5}



37 to 54 {3.8 to 5.6}



50 to 65 {5.0 to 6.5}



50 to 60 {5.0 to 6.0}



M12



38 to 56 {3.8 to 5.5}



35 to 51 {3.5 to 5.2}



80 to 105 {8.0 to 10.5}



70 to 95 {7.5 to 9.5}



90 to 120 {9 to 12}



85 to 110 {8.5 to 11}



00-36



00 Hexagon Nuts (Unit: N·m {kgf·m}) Strength 4T



6T



Identification symbol



Nominal diameter



Standard screw thread



Coarse screw thread



Standard screw thread



Coarse screw thread



M5



2 to 3 {0.2 to 0.3}



–



4 to 6 {0.4 to 0.6}



–



M6



4 to 6 {0.4 to 0.6}



–



7 to 10 {0.7 to 1.0}



–



M8



9 to 13 {0.9 to 1.3}



–



16 to 24 {1.7 to 2.5}



–



M10



18 to 27 {1.8 to 2.7}



17 to 25 {1.8 to 2.6}



34 to 50 {3.5 to 5.1}



32 to 48 {3.3 to 4.9}



M12



34 to 50 {3.4 to 5.1}



31 to 45 {3.1 to 4.6}



70 to 90 {7.0 to 9.5}



65 to 85 {6.5 to 8.5}



M14



60 to 80 {6.0 to 8.0}



55 to 75 {5.5 to 7.5}



110 to 150 {11 to 15}



100 to 140 {11 to 14}



M16



90 to 120 {9 to 12}



90 to 110 {9 to 11}



170 to 220 {17 to 23}



160 to 210 {16 to 21}



M18



130 to 170 {14 to 18}



120 to 150 {12 to 16}



250 to 330 {25 to 33}



220 to 290 {23 to 30}



M20



180 to 240 {19 to 25}



170 to 220 {17 to 22}



340 to 460 {35 to 47}



310 to 410 {32 to 42}



M22



250 to 330 {25 to 33}



230 to 300 {23 to 30}



460 to 620 {47 to 63}



420 to 560 {43 to 57}



M24



320 to 430 {33 to 44}



290 to 380 {29 to 39}



600 to 810 {62 to 83}



540 to 720 {55 to 73}



Hexagon Flange Nuts (Unit: N·m {kgf·m}) Strength 4T Identification symbol



Nominal diameter



Standard screw thread



Coarse screw thread



M6



4 to 6 {0.4 to 0.6}



–



M8



10 to 15 {1.0 to 1.5}



–



M10



21 to 31 {2.1 to 3.1}



20 to 29 {2.0 to 3.0}



M12



38 to 56 {3.8 to 5.6}



35 to 51 {3.5 to 5.2}



00-37



TABLE OF STANDARD TIGHTENING TORQUES Tightening Torque for General-Purpose Flare Nut (Unit: N·m {kgf·m}) Pipe diameter Tightening torque



φ4.76 mm



φ6.35 mm



φ8 mm



φ10 mm



φ12 mm



φ15 mm



17 {1.7}



25 {2.6}



39 {4.0}



59 {6.0}



88 {9.0}



98 {10}



Tightening Torque for General-Purpose Air Piping Nylon Tube (DIN Type) (Unit: N·m {kgf·m}) Nominal diameter × wall thickness Tightening torque



6 × 1 mm 20



+6 0



{2.0



+0.6 0



10 × 1.25 mm }



34



+10 0



{3.5



+1.0 0



}



12 × 1.5 mm +10 0



49



+1.0 0



{5.0



15 × 1.5 mm }



54



+5 0



{5.5



+0.5 0



}



Tightening Torque for General-Purpose Air Piping Nylon Tube (SAE Type) (Unit: N·m {kgf·m}) Nominal diameter Tightening torque



00-38



1/4 in. 13



+4 0



{1.3



+0.4 0



3/8 in. }



29



+5 0



{3.0



+0.5 0



1/2 in. }



49



+5 0



{5.0



+0.5 0



5/8 in. }



64



+5 0



{6.5



+0.5 0



}



GROUP 11 ENGINE SPECIFICATIONS .............................................................................. 11-2 STRUCTURE AND OPERATION 1. Exploded View ............................................................................. 11-3 2. Cylinder Head and Cylinder Head Gasket .................................... 11-4 3. Valve Mechanism ......................................................................... 11-5 4. Timing Chain ............................................................................... 11-6 5. Timing Gears ............................................................................... 11-7 6. Connecting Rod ........................................................................... 11-8 7. Piston .......................................................................................... 11-8 8. Flywheel .............................................................................................. 11-9 9. Crankcase, Crankshaft and Main Bearing ..................................... 11-10 10.Oil Seal ............................................................................................. 11-13 TROUBLESHOOTING ..................................................................... 11-14 ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Measuring Compression Pressure ............................................. 11-16 2. Inspection and Adjustment of Valve Clearance .......................... 11-18 3. Inspection and Replacement of Timing Chain ............................ 11-19 4. Protrusion of Timing Chain Tensioner’s Plunger ........................ 11-25 5. Damage to the Starter Pinion Contact Surface of Ring Gear ....... 11-26 ENGINE REMOVAL AND INSTALLATION........................................11-28 ROCKER COVER ............................................................................ 11-30 CAMSHAFT HOLDER AND CAMSHAFT ....................................... 11-32 CYLINDER HEAD AND VALVE MECHANISM..................................11-38 PISTON AND CONNECTING ROD ...................................................11-54 FLYWHEEL ........................................................................................11-66 TIMING GEAR CASE.........................................................................11-70 TIMING GEAR....................................................................................11-74 CRANKSHAFT AND CRANKCASE ..................................................11-80



11-1



SPECIFICATIONS Item



Specifications



Engine model



4M42T3



Type



4-cylinder, in-line, water-cooled, 4-cycle diesel engine



Combustion chamber



Direction injection type



Valve mechanism



Double overhead camshaft (DOHC)



Maximum output



kW {PS} /rpm



96 {130} /3200



Maximum torque



N·m {kgf·m} /rpm



294 {30} /1700



Bore × stroke Total displacement Compression ratio



11-2



mm 3



cm {L}



φ95 × 105 2977 {2.977} 17.0



STRUCTURE AND OPERATION



11



1. Exploded View



11-3



STRUCTURE AND OPERATION 2. Cylinder Head and Cylinder Head Gasket



2.1 Cylinder head • The arrangement of the intake ports and exhaust ports is of a cross-flow type. The exhaust ports are provided on the right side and the intake ports are provided on the left side of the cylinder head. • Cylinder head bolt (M12) is fastened to the upper crankcase and cylinder head bolt (M10) is fastened to the timing gear case. • The cylinder head bolts must be tightened according to the specified procedure.



2.2 Cylinder head gasket • Select and use a cylinder head gasket of a thickness that can accommodate the piston projection. • The size (thickness) class of the gasket can be identified by the shape of the notches cut on the edge of each gasket.



11-4



11 3. Valve Mechanism



• The camshaft is driven by the timing chain. The exhaust camshaft and the intake camshaft are supported by camshaft holders at the journals and are retained by camshaft caps from above. • There are two types of rocker arms: long rocker arm and short rocker arm. They are alternately provided by the valve position.



11-5



STRUCTURE AND OPERATION 4. Timing Chain



• The timing chain is an endless chain with 110 links that connects the exhaust cam sprocket, intake cam sprocket and the idler sprocket. • The timing chain has mark link plates at three locations that indicate the position at which the crankshaft and the camshaft should take when the chain is installed. There are two plates at the first location and one plate at the second location. The first location (two-mark-link location) must be aligned with the mating mark “ ” on the exhaust cam sprocket and the intake cam sprocket, and the second location (one-mark-link location) must be aligned with the mating mark “ ” on the idler sprocket. • The chain tensioner gives tension to the timing chain. The chain tensioner has a plunger with a built-in spring. • When the chain tensioner is installed in position, the plunger directly pushes the tension lever, and the timing chain is tensioned automatically by a force determined by the tension of the plunger spring. • After the plunger is installed, it is locked in place by a cam provided in the chain tensioner, which prevents accidental deflection of the timing chain while it is driven. Do not crank the engine in the reverse direction after installing the chain tensioner, as this will apply undue forces to the plunger and may cause such undesirable consequences as cam being over ridden by the plunger.



11-6



11 5. Timing Gears



• Each timing gear has mating mark(s) “1” or “5” to ensure that it is engaged correctly with another gear during installation.



5.1 Idler gear • The idler gear is press fitted into the idler sprocket, which drives the timing chain, and rotates on the idler shaft. • The idler shaft is anchored to the crankcase using the idler washer and bolt. The idler sprocket is fitted with the idler bushing, which is lubricated by engine oil supplied through the oil holes drilled in the idler shaft.



11-7



STRUCTURE AND OPERATION 6. Connecting Rod



• The “F” mark indicates the assembly direction onto the piston and engine front side. • The color mark indicates the diameter class of the large end.



7. Piston • For selective fit of the pistons with the upper crankcase, match corresponding size marks on the pistons and upper crankcase. The size marks of the pistons are “A” through “C” and the “C” marked piston has the largest outside diameter. • Install the pistons with the front marks facing forward of the engine.



11-8



11 8. Flywheel



• The bearing is fitted into the flywheel and held in place by the washers. • The peripheral edge on one side of the ring gear is chamfered for easy engagement of the gear with the starter pinion.



11-9



STRUCTURE AND OPERATION 9. Crankcase, Crankshaft and Main Bearing



9.1 Crankcase • The crankcase is a bi-block type consisting of an upper crankcase and a lower crankcase that are assembled to grip the crankshaft in between. • The upper crankcase has cylinders whose surfaces are machined for direct contact with sliding pistons. The walls of the cylinders have water jackets for cooling the cylinders. • The main cap bolts that hold the upper crankcase and the lower crankcase together must be tightened according to the specified procedure.



11-10



11 • The upper crankcase is provided with piston size marks “A”, “B” and “C” stamped to help to select appropriate pistons.



9.2 Crankshaft • The crankshaft has two sets of color marks. Color mark A indicates the outside diameter of the journals (at five locations), and color mark B indicates the outside diameter of the pins (at four locations).



9.3 Main bearing • Each upper main bearing has an oil hole, which provides a passage for engine oil to the corresponding crankshaft journal. • Main bearings of different thickness are available so that the most appropriate ones can be selected to ensure proper clearance between them and journals. Bearing thickness classes are identified by color marks (red, blue and yellow) painted on the sides of the bearings. • All the upper and lower main bearings are identical except for the No. 3 upper bearing and the No. 3 lower bearing.



11-11



STRUCTURE AND OPERATION 9.4 Thrust plates • Two upper and lower thrust plate pairs are installed on both sides of the upper and lower main bearings at the rear most journal of the crankshaft. • The thrust plates must be of a thickness that corresponds to the end play of the crankshaft. Each thrust plate has two oil grooves to ensure its minimum friction against the crankshaft journal.



11-12



11 10.Oil Seal



10.1 Front oil seal • The front oil seal is fitted in the timing gear case, and prevents oil from leaking by contact of its lip with the crankshaft pulley.



10.2 Rear oil seal • The rear oil seal is fitted in the rear oil seal case, and prevents oil from leaking by contact of its lip with the crankshaft.



11-13



TROUBLESHOOTING



Low power output



Abnormal engine noise



Symptoms



Incorrect valve clearance



O



O



Defective cylinder head gasket



O



O



Worn valve and valve seat; carbon deposits



O



O



Weakened valve spring



O



O



Possible causes



Cylinder head and valve mechanism



Worn lifter shim



O



Defective timing chain-related parts Timing gears Camshaft Pistons and connecting rods



Crankshaft



Fuel system



Cooling system Intake and exhaust system



O



Incorrect backlash in timing gears



O



Poor lubrication of timing gears and idler shaft



O



Excessive end play in camshaft



O



Worn camshaft



O



Worn/damaged piston ring groove(s)



O



O



Worn/damaged piston ring(s)



O



O



Worn piston pin and connecting rod small end



O



Excessive end play in crankshaft



O



Incorrectly fitted crankshaft



O



Worn/damaged crankshaft pins and connecting rod bearings



O



Worn/damaged crankshaft journals and main bearings



O



Defective supply pump



O



O



Faulty fuel spray from injector



O



O



Air or water trapped in fuel system components



O



Irregular fuel (kerosene, heavy oil, bio-fuel, etc.) is used



O



Malfunctioning cooling system



O



Loose/damaged belts



O



Clogged air cleaner



O



Malfunctioning turbocharger



O



Clogged muffler



O



Incorrect oil viscosity



Gr13



Gr14



O Gr15



O



Incorrectly fitted piping and hoses



O



Defective/incorrectly fitted alternator and other auxiliaries



O



11-14



Reference Gr



11 M E M O



11-15



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Measuring Compression Pressure Service standards Location



Maintenance item Each cylinder (at 220 rpm)



–



Compression pressure



Cylinder-to-cylinder pressure difference



Standard value



Limit



Remedy



2840 kPa {29 kgf/cm2}



2260 kPa {23 kgf/cm2}



Inspect



–



295 kPa {3 kgf/cm2} or less



Inspect



Special tools (Unit: mm) Mark



Tool name and shape



Part No.



Application



Compression gauge adaptor MH063494



A B M16 × 1.5 M10 × 1.25



Measuring compression pressure



• For the hybrid electric vehicle system, there are two methods of cranking the engine, a conventional method using the starter and a method using the motor of the hybrid electric vehicle system. • If the engine is cranked with the motor of the hybrid electric vehicle system, measurement of compression pressure may become inaccurate since the engine speed is slightly higher than when the starter is used for cranking. For this reason, engine cranking should be performed using the starter following the procedure below. • Turn the starter switch quickly up to the START position before the READY indicator lamp in the meter cluster illuminates. Though the indicator lamp illuminates in several seconds, the starter will keep running. • If the starter switch is turned to the START position after the READY indicator lamp in the meter cluster illuminates, the starter will not run and the engine is cranked with the motor of the hybrid electric vehicle system. In this case, turn the starter switch to OFF and try again. • A drop in compression pressure can be used as a guide to determine when the engine should be overhauled. • Measure the compression pressure at regular intervals. Keeping track of its transmission can provide a useful tool for troubleshooting. On new vehicles and vehicles with newly replaced parts, the compression pressure will be somewhat higher depending on the break-in condition of piston rings, valve seats, etc., but this will return to normal as the parts wear down. • Before the compression measurement, check that the engine oil, starter, and battery are in normal condition. • Place the vehicle in the following conditions. • Warm up the engine until the coolant temperature reaches approximately 80 to 90°C. • Turn off the lights and auxiliaries. • Place the transmission shift lever into the N position. • Place the steering wheel in the straight-ahead position. • Remove the fuse (M9) to prevent fuel from being injected when the engine is cranked by the starter.



CAUTION • When cranking the engine, never shut off the power to the engine electronic control unit by disconnecting the engine electronic control unit connector or the like. If the engine is cranked while shutting off the power to the engine electronic control unit, the electronic control unit cannot control the supply pump and this may cause failure to the pump.



11-16



11 • Remove all glow plugs. • Cover the glow plug mounting holes with shop towels. After cranking the engine with the starter, check that no foreign substances are deposited on the shop towels. • If there are deposits (such as engine oil or coolant) on the shop towels, the following may be the cause: • Deposits of engine oil alone can mean a defective piston ring seal; the piston rings must be inspected. • Deposits of both engine oil and coolant can mean cracks in the cylinders or cylinder head; the crankcase or cylinder head must be replaced.



WARNING • When coolant and engine oil deposits are evident, cranking the engine could be dangerous as these substances, heated to high temperatures, will blow out from the glow plug mounting holes. Make sure to stay away from the glow plug mounting holes when the engine is being cranked. • Attach to one of the glow plug mounting holes and then attach a compression gauge. • Crank the engine and measure the compression pressure for all the cylinders one after another. Determine the compression pressure difference between the cylinders. • If the compression pressure and the cylinder-to-cylinder pressure difference are not within the limit, pour a small amount of engine oil into the corresponding glow plug mounting hole and remeasure the compression pressure. • If the compression pressure increases, the piston rings and cylinder surfaces may be badly worn or otherwise damaged. • If the compression pressure remains unchanged, there may be seizure in the valves, the valves may be incorrectly seated or the cylinder head gasket may be defective. • Install the glow plugs. (See later sections.)



11-17



ON-VEHICLE INSPECTION AND ADJUSTMENT 2. Inspection and Adjustment of Valve Clearance Service standards (Unit: mm) Location –



Maintenance item Valve clearance (when en- Intake valve gine is cold) Exhaust valve



Standard value



Limit



Remedy



0.1



–



Adjust



0.15



–



Adjust



Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened Lock nut (adjusting screw mounting)



Tightening torque



Remarks



9 to 10 {0.9 to 1.1}



–



Special tools Mark



Tool name and shape



Part No.



Front hub and flange yoke holder



MB990767



Application



For cranking the engine



• Valve clearance should be checked and adjusted as follows while the engine is still cold. [Inspection] • Remove the rocker cover. • Bring the No. 1 or No. 4 cylinder piston to the top dead center (TDC) on the compression stroke according to the following procedure: • Rotate the crankshaft pulley in the illustrated direction so that the notch on the crankshaft pulley is aligned with the “0” mark on the timing gear case.



CAUTION • Do not turn the crankshaft pulley in the opposite direction to the illustrated one (counterclockwise), as this may cause damage to the tensioner that is adjusting the tension of the timing chain on the timing gear. If you turn the crankshaft pulley in the wrong direction by mistake, remove and reinstall the chain tensioner. • This will place either the No. 1 or No. 4 cylinder piston at TDC on the compression stroke. When the protrusion on the camshaft is facing upward the No.1 piston is at TDC. Rotate the engine by one full turn to switch the TDCs of the No. 1 and No. 4 cylinder pistons.



11-18



11 • With the No. 1 or No. 4 cylinder piston at TDC, measure the clearance of the valves marked with a circle in the table below. Cylinder No.



1



2



3



4



Valve



IN



EX



IN



EX



IN



EX



IN



EX



No. 1 cylinder piston at TDC on compression stroke



O



O



O



–



–



O



–



–



No. 4 cylinder piston at TDC on compression stroke



–



–



–



O



O



–



O



O



• The feeler gauge must have a slight drag when taking measurements. • If the feeler gauge can be moved without any resistance, the measurement will be incorrect. • If the measurements are not within the standard value range, adjust the valve clearance via the following procedures. [Adjustment] • For valve clearance adjustment, loosen the lock nut and turn the adjusting screw so that the feeler gauge moves with some resistance. • After the adjustment, hold the adjusting screw in place with a screwdriver and tighten the lock nut to the specified torque. Inspect the valve clearance again with the feeler gauge. • After the inspection, install the rocker cover and the gasket. (See later sections.)



3. Inspection and Replacement of Timing Chain Service standards (Unit: mm) Location –



Maintenance item Protrusion of chain tensioner’s plunger



Standard value



Limit



Remedy



–



20



Replace timing chain



Special tools (Unit: mm) Mark



Tool name and shape



Front hub and flange yoke holder



Part No.



MB990767



Application



Cranking the engine



11-19



ON-VEHICLE INSPECTION AND ADJUSTMENT Mark



Tool name and shape



Part No.



Fixture tool



*MH063678



Dummy tensioner



*MH063554



Chain disassembly tool A: Body B: Slider C 13.5



Riveting tool A: Set bolt B: Punch C: Die D: Holder E 18



F 9.6



Application



Replacement of timing chain *MH063555 A: MH063556 B: MH063558



*MH063559 A: MH063563 B: MH063565 C: MH063564 D: MH063560



Tools marked with * are components of the timing chain tool set (MH063679). [Inspection] • Perform the following inspections. If there is any abnormality, replace the timing chain. (1) Noise • Run the engine and check for any abnormal noise caused by interference between piston and valve. • If abnormal noise is heard, check the pistons and valves for possible interference. (See “CYLINDER HEAD AND MECHANISM” and “PISTON AND CONNECTING ROD”.) (2) Protrusion of chain tensioner’s plunger • Measure the protrusion of the chain tensioner’s plunger to determine the elongation of the timing chain. • Remove the chain tensioner from the cylinder head. The plunger is bounced a little out of the chain tensioner by the spring inside. Prevent the plunger from falling. • Measure the distance from the forward end of the plunger to the farthest wear mark. If the measured value exceeds the specified limit, replace the timing chain.



11-20



11 [Replacement] • Remove the fan coupling, front engine hanger and rocker cover. • To check the timing position, rotate the crankshaft pulley clockwise with and align the timing mark “0” on the timing gear case with the notch on the crankshaft pulley to bring the No. 1 cylinder piston to the top dead center (TDC) on the compression stroke. The No. 1 cylinder piston is at TDC if the protrusion on the camshaft is facing upward.



• With the No. 1 cylinder piston at TDC, check that the two mating marks “ ” on the cam sprocket are at the illustrated positions.



• Install on the cylinder head and tighten the bolts (M8 × 20 mm) firmly. • Crank the engine by hand and bring the mark link plate (one plate) of the timing chain to the illustrated position of the cam sprocket.



11-21



ON-VEHICLE INSPECTION AND ADJUSTMENT • Remove the chain tensioner and its gasket from the cylinder head. • Install on the cylinder head.



CAUTION • Fill the space around the timing chain with shop towels to prevent parts from falling into the timing gear case.



• Using , remove the pins of the mark link plate (one plate) from the timing chain. Then, remove the mark link plate and the plate from the timing chain. • If the pins are difficult to remove, press them out by inserting the temporary link of the timing chain kit into the pin holes from the front side of the engine.



CAUTION • Do not mix up the mark link plate, pins and plates of the timing gear with those of the timing chain kit.



11-22



11 • With the mark link plate (two plates) of the new timing chain facing the front of the engine, connect the new timing chain with the unlinked end of the old timing chain using a temporary link and clip. • Remove the shop towels from the timing chain.



• Slowly crank the engine by hand in the normal direction to rotate the timing chain so that the new timing chain takes the place of the old one.



• Stop cranking when the old timing chain is completely delivered and the temporary link comes to the illustrated position of the cam sprocket. • Fill the space around the timing chain with shop towels again. Remove the temporary link and the timing chain.



CAUTION • When the temporary link and clip are removed, discard them so as not to mix them with the timing chain kit.



• Remove



from the cylinder head.



• Install a permanent link from the rear of the engine to connect the two ends of the new timing chain. • Remove .



11-23



ON-VEHICLE INSPECTION AND ADJUSTMENT • Crank the engine by hand until the permanent link comes to the illustrated position of the intake cam sprocket.



• Attach a mark link plate onto the punch of . • Align the pins of the permanent link with the holes on the mark link plate to set . • Tighten the bolt of until it cannot be tightened any further.



• Check that the pins of the permanent link project by the amount indicated in the illustration.



• Turn around 180 degrees and mount it so that the die is aligned with the mark link plate. • Tighten the bolt of to approximately 64 N·m {6.5 kgf·m} and flatten the end of each pin of the permanent link.



• Check that the pin ends are flattened to the width indicated in the illustration. • Remove the shop towels from the timing chain.



11-24



11 • Check that the new chain tensioner’s plunger is locked in place by the hook, then install it to the cylinder head with the new gasket. Make sure the sealant application surface of the gasket. • Crank the engine in the normal direction (clockwise as viewed from the front of the engine). This unhooks the plunger, allowing the tension of the timing chain to be adjusted by the internal ratchet mechanism.



CAUTION • After the chain tension is installed, if the engine is reversed (counterclockwise as viewed from the front of the engine), an excessive thrust is imparted to the plunger, possibly causing damage to the cam. In case the engine is reversed, remove and check the chain tensioner. Reinstall it if there is no abnormality. • With the No. 1 cylinder piston at TDC, check that the mating marks “ ” on the cam sprocket are at the same place as before. • Install the rocker cover and fan coupling.



4. Protrusion of Timing Chain Tensioner’s Plunger Service standards (Unit: mm) Location –



Maintenance item Protrusion of timing chain tensioner’s plunger



Standard value



Limit



Remedy



–



20



Replace



• Measure the protrusion of the chain tensioner’s plunger to determine the elongation of the timing chain. • Remove the chain tensioner from the cylinder head. The plunger is bounced a little out of the chain tensioner by the spring inside. Prevent the plunger from falling. • Measure the distance from the forward end of the plunger to the farthest wear mark. • If the measured value exceeds the specified limit, replace the timing chain. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”, “3. Inspection and Replacement of Timing Chain”.)



11-25



ON-VEHICLE INSPECTION AND ADJUSTMENT 5. Damage to the Starter Pinion Contact Surface of Ring Gear • Remove the starter from the engine. (See Gr54.) • Visually examine the starter pinion contact surface of the ring gear for crack and other damage from the starter mounting hole. • If there is any cracks or damages, replace the ring gear. (See “FLYWHEEL”.)



11-26



11 M E M O



11-27



ENGINE REMOVAL AND INSTALLATION



CAUTION • Hoist the engine using care not to strike it against the cab and rear body. • Only use hoisting equipment appropriate for the engine and transmission mass (approximately 510 kg).



Disassembly sequence 1 Transmission mounting support 2 Engine and transmission



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



11-28



Parts to be tightened



Tightening torque



Remarks



Bolt (front mounting installation)



50 to 65 {5.1 to 6.6}



–



Nut (transmission mounting support installation)



130 to 170 {13 to 17}



–



Nut (transmission mounting support installation)



220 to 300 {22.4 to 30.6}



–



11 Removal procedure Removal: Engine and transmission • Hook the wire rope and lifting mechanism each onto the three hangers on the engine and lift the engine with a crane until they are tight. • Support the transmission with the transmission jack. • Check that all wiring and piping have been disconnected from the engine.



• Remove the engine rear support.



• Push down the transmission part of the assembly, and then move the engine and transmission assembly forward.



• Once the transmission is out of the front end of the rear body, turn the engine and transmission assembly 90 degrees to the right so as to prevent the assembly from hitting the frame and cab, and lower it to the right side of the vehicle. Make fine adjustments to the hoisting equipment as necessary.



11-29



ROCKER COVER



11-30



11 Disassembly sequence 1 2 3 4 5 6 7 8 9 10



Oil filler cap Grommet Cover Spacer Insulator Rocker cover rubber Snap ring Fuel return hose Injection pipe (See Gr13.) Bolt (with hexagonal hole)



11 12 13 14 15 16 17



Injector (See Gr13.) O-ring Tip gasket Rocker cover O-ring Rocker cover gasket A Rocker cover gasket B



: Locating pin : Non-reusable parts



WARNING • Fuel is highly flammable. Keep it away from flames and sources of heat. • Thoroughly wipe up any spilled fuel. Otherwise, it may catch fire.



CAUTION • When removing the injectors, be careful not to hit them with the tools etc. • To help prevent fuel injection problems, keep the injector and injection pipe free from contamination. • Before removing the injectors, check that the injector mounting holes are clear of trapped water, oil and any other substances.



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • Be sure to tighten the injector mounting bolts to the specified torque. Overtightening the bolts can deform the injectors, resulting in incorrect fuel injection.



Tightening torques (Unit: N·m {kgf·m}) Mark



Parts to be tightened Injection pipe Bolt (injector mounting) Bolt (rocker cover mounting)



Tightening torque



Remarks



30.4 to 35 {3.1 to 3.6}



–



5.2 to 7.2 {0.53 to 0.73}



–



5 ± 1 {0.5 ± 0.1}



–



Lubricant and/or sealant Mark



Points of application O-ring



Specified lubricant and/or sealant



Quantity



Engine oil



As required



11-31



CAMSHAFT HOLDER AND CAMSHAFT



Disassembly sequence 1 2 3 4 5 6 7



11-32



Upper guide plate Bolt No. 1 camshaft cap Camshaft cap Chain tensioner Gasket Exhaust camshaft



8 9 10 11 12 13 14



Intake camshaft Camshaft holder Adjusting screw Short rocker Adjusting screw Long rocker Pivot bolt



*a: *b::



Cam sprocket Timing chain Locating pin : Non-reusable parts



11 CAUTION • Each camshaft cap and camshaft holder are processed as a pair. Do not replace only one of the two. Never change the combination.



Assembly sequence Follow the disassembly sequence in reverse.



Service standards (Unit: mm) Location –



Maintenance item End play of camshaft Short rocker side



7



Exhaust camshaft



Difference between major axis and minor axis Long rocker side



Major axis: 39.913 Minor axis: 34 Major axis: 39.163 Minor axis: 33



Bend Oil clearance at journals Long rocker side



8



Difference between major axis and Short Intake camshaft minor axis rocker side



Major axis: 40.160 Minor axis: 34 Major axis: 39.102 Minor axis: 33



Bend Oil clearance at journals 11, 13



Clearance at rocker roller in radial direction



Standard value



Limit



Remedy



0.10 to 0.18



0.3



Inspect



5.913



5.86



Replace



6.163



6.11



Replace



0.015



0.03



Replace



0.05 to 0.086



0.15



Replace



6.160



6.11



Replace



6.102



6.05



Replace



0.015



0.03



Replace



0.05 to 0.086



0.15



Replace



0.024 to 0.058



–



Replace



Tightening torques (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



Bolt (cam sprocket mounting)



88 {9.0}



Wet (left hand thread)



Bolt (camshaft cap mounting)



18.6 to 20.6 {1.9 to 2.1}



–



Lock nut (adjusting screw mounting)



9 to 10 {0.9 to 1.1}



–



Pivot bolt



30 to 46 {3.1 to 4.7}



–



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Threads and seating surfaces of bolt (cam sprocket mounting) Cam, journals and thrust surface of No. 1 journal of camshaft Rocker roller Sphere of adjusting screw Concave of pivot bolt



11-33



CAMSHAFT HOLDER AND CAMSHAFT Removal procedure Removal: Cam sprocket • Bring the No. 1 cylinder piston to the top dead center (TDC) on the compression stroke. Make sure that the camshaft cam faces up in this position. • After holding on the hexagonal portion of the camshaft to prevent it from turning, loosen the bolt to remove the cam sprocket.



CAUTION • When removing the bolt, do not use the timing chain for the stopper. • The bolt has a left-hand thread and has an arrow on its top that indicates the direction for tightening the bolt. To remove the bolt, turn it in the direction opposite to the arrow. • The cam sprocket and the timing chain have the positional relation for installation. Keep the cam sprocket attached to the timing chain unless absolutely necessary. Inspection: End play of camshaft • Attach a dial gauge to the rear of the engine and measure end play of the camshaft. • If the measurement exceeds the limit, replace the defective part(s).



Inspection procedure Inspection: Camshaft (1) Difference between major axis and minor axis • If the measured value is below the specified limit, replace the camshaft.



(2) Bend • Support the camshaft at its No. 1 journal and No. 5 journal. Measure the extent of bend in the camshaft at the center of the No. 3 journal. • Turn the camshaft through one revolution. One-half of the dial indicator reading represents the extent of bend. • If the measurement exceeds the specified limit, replace the camshaft.



11-34



11 (3) Oil clearance at the journals • Measure the oil clearance, and if the measured value is higher than the limit, replace the faulty parts.



CAUTION • Each camshaft cap and camshaft holder are processed as a pair. Do not replace only one of the two. Never change the combination.



Inspection: Clearance at the rocker (roller) in the radial direction • If the measured value is not within the standard value range, replace the rocker.



11-35



CAMSHAFT HOLDER AND CAMSHAFT Installation procedure Installation: Chain tensioner and gasket • Turn the cam of the chain tensioner, push in the plunger by hand and hold it in the retracted position with the hook. • Install the gasket on the cylinder head so that the sealant will be on the chain tensioner side.



CAUTION • Installing the chain tensioner without holding the plunger in the retracted position will apply an excessive load on the timing chain and cause damage. Always push in the plunger and hold it in the retracted position before installing the tensioner. Installation: Chain tensioner • Install the chain tensioner, then crank the engine in the normal direction (to clockwise as seen from the front of the engine). This will undo the hook, and the ratchet mechanism inside the chain tensioner will start adjusting the tension of the timing chain.



CAUTION • Do not crank the engine in the reverse direction (counterclockwise as seen from the front of the engine) after installing the chain tensioner, as this will apply an excessive load on the plunger and may cause damage to the cam. If you crank the engine in the reverse direction by mistake, remove the chain tensioner and inspect it for damage. The tensioner may be reinstalled if it is intact.



11-36



11 M E M O



11-37



CYLINDER HEAD AND VALVE MECHANISM



Disassembly sequence 1 2 3 4 5 6



Connecting plate Glow plug Cylinder head bolt (M10) Cylinder head bolt (M12) Cylinder head (See later sections.) Cylinder head gasket



*a: *b: *c: *d: *e::



Cam sprocket Timing chain Timing gear case Crankcase Front plate Locating pin : Non-reusable parts



CAUTION • Glow plugs are fitted protruding from the bottom of the cylinder head. Therefore, when placing the cylinder head on the work bench without glow plugs removed, be careful not to have the glow plugs damaged.



11-38



11 Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • The cylinder head bolts (M12) are tightened using the torque-turn method. Any cylinder head bolt that has three marks indicating that the bolt has been tightened three times already must be replaced with a new one.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



1.0 to 1.5 {0.1 to 0.15}



–



Glow plug



18 {1.8}



–



Cylinder head bolt (M10)



58 {5.8}



–



Cylinder head bolt (M12)



49 {5} + 90°+ 90°



• Wet • Reusable up to three times



Nut (connecting plate mounting)



Lubricant and/or sealant Mark



Points of application Cylinder head bolt threads and seating surfaces of their heads Top surfaces of areas where timing gear case, crankcase and front plate join together



Specified lubricant and/or sealant



Quantity



Engine oil



As required



ThreeBond 1217H



As required



Special tools Mark



Tool name and shape



Cam sprocket holder kit



Part No.



MH063490



Application



Supporting the cam sprocket



Removal procedure Removal: Cylinder head • Loosen the cylinder head bolts (M10: 1, 2), (M12: 3 to 20) by turns in the order indicated in the illustration before they are removed in the same order.



11-39



CYLINDER HEAD AND VALVE MECHANISM • With the timing chain kept attached to the cam sprocket, remove the cylinder head by lifting it straight up. • After removing the cylinder head, hold the cam sprocket using . Be careful not to drop the timing chain.



Removal: Cylinder head gasket



CAUTION • When removing the cylinder head gasket, be careful not to scratch the cylinder head, upper crankcase and the timing gear case.



Installation procedure Installation: Cylinder head



CAUTION • Before fitting the cylinder head bolts (M12), check the punch marks on each bolt’s head. (Bolts with one or two punch marks can be reused.) • The number of punch marks indicates the number of times the bolt has been tightened using the torque-turn method. Any bolt that has three marks (indicating that the bolt has been tightened three times already) must be replaced with a new one.



11-40



11 • The cylinder head gasket is a selective use part. Choose the gasket according to the following procedure. • Measure the amount of piston projection for every cylinder. (See the PISTON AND CONNECTING ROD section.) • After the measurement, select a cylinder head gasket with the thickness appropriate for the average amount of piston projection from the following table. • If any cylinder has a piston that has the amount of projection greater than the maximum value of the average piston projection amount by 0.05 mm or more, use a gasket a rank thicker (A→B, B→C, C→D). Unit: mm Piston projection



Cylinder head gasket



Average piston projection



Size ( ): Number of notches



Thickness when tightened



-0.209 to -0.149



A (1)



0.70 ± 0.04



-0.148 to -0.088



B (2)



0.75 ± 0.04



-0.087 to -0.027



C (3)



0.80 ± 0.04



-0.026 to 0.035



D (4)



0.85 ± 0.04



• The size class of the cylinder head gasket can be determined from the number of notches on the gasket edge.



CAUTION • If pistons, connecting rods or other relevant parts are replaced, measure to check the pistons for any change in protrusion. • Clean the sealant application surfaces of each part. • Apply sealant to the top surfaces of the areas where the timing gear case, the front plate and the upper crankcase join together (two locations). • Install the cylinder head together with the cylinder head gasket on the crankcase within three minutes of applying the sealant, being careful not to dislodge the sealant.



CAUTION • Do not damage the cylinder head gasket. If damaged, abnormalities such as coolant or oil leakage, engine noise and output drop could be caused. • Do not run the engine within one hour of installing the cylinder head. Reapply sealant to the surfaces indicated above if any cylinder head bolts are loosened or removed. • Tighten the cylinder head bolts by following different tightening procedures for bolts 1 to 18 (M12) and bolts 19 and 20 (M10). The bolts should be tightened in steps according to the following instructions. • Install the cylinder head bolts with the shear droop (press punched edge) side of the washer on each of them facing in the indicated direction.



11-41



CYLINDER HEAD AND VALVE MECHANISM Tightening procedure for bolts 1 to 18 • Retighten the tightened cylinder head bolts (M12) to a torque of 49 N·m {5 kgf·m} in the order indicated in the illustration. • After tightening, tighten the bolts further 90 degrees in the order indicated in the illustration. • Then, tighten the bolts further another 90 degrees in the order indicated in the illustration. • Finally, put a punch mark on the head of each bolt (M12) to indicate the number of times the bolt has been used.



CAUTION • Cylinder head bolts (M12) are tightened using the torqueturn method, and must never be additionally tightened after the final tightening. Tightening procedure for bolts 19 and 20 • After completing the tightening procedure for bolts 1 to 18 (M12), tighten bolts 19 and 20 (M10) to 58 N·m {5.8 kgf·m}.



11-42



11 M E M O



11-43



CYLINDER HEAD AND VALVE MECHANISM Cylinder Head



Disassembly sequence 1 2 3 4 5 6 7



Valve cap Valve cotter Valve spring retainer Exhaust valve spring Intake valve spring Valve spring seat Valve stem seal



8 9 10 11 12 13 14



Exhaust valve Intake valve Exhaust valve guide Intake valve guide Exhaust valve seat Intake valve seat Sealing cap (φ28 mm)



15 Sealing cap (φ22 mm) 16 Sealing cap (φ14 mm) 17 Cylinder head : Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • When exhaust or intake valves are removed, their valve stem seals must be replaced.



11-44



11 Service standards (Unit: mm) Location



4



Exhaust valve spring



Maintenance item



Standard value



Limit



Free length



64.95



61.70



356.0 N ± 18 N {36.3 ± 1.8 kgf}



–



–



2°



49.61



47.13



243.2 N ± 12 N {24.8 ± 1.2 kgf}



–



–



2°



Stem diameter



φ6.6 –0.05 –0.07



φ6.45



Valve seat angle



45° ± 15’



–



Reface



1.0



0.8



Replace



0.3 ± 0.25



0.8



Replace



0.05 to 0.09



0.15



Replace



φ6.6 –0.025 –0.040



φ6.45



Replace



45° ± 15’



–



Reface



1.0



0.8



Replace



0.3 ± 0.25



0.8



Replace



Installed load (installed length: 39.5) Tilt Free length



5



Intake valve spring



Installed load (installed length: 39.5) Tilt



8



Exhaust valve



Valve margin Sinkage from cylinder head bottom surface



8, 10



Exhaust valve stem-to-exhaust valve guide clearance Stem diameter Valve seat angle



9



Intake valve



Valve margin Sinkage from cylinder head bottom surface



9, 11



Intake valve stem-to-intake valve guide clearance



Remedy



Replace



Replace



Replace



0.02 to 0.06



0.1



Replace



12



Exhaust valve seat width



2.2 ± 0.2



2.8



Replace



13



Intake valve seat width



2.2 ± 0.2



2.8



Replace



0.05



0.2



Replace Replace



Distortion of bottom surface 17



Height from top to bottom



Cylinder head



Valve seat hole diameters



116 ± 0.2



115.8



Intake side



φ31.5 +0.025 0



–



Exhaust side



φ29.5 +0.021 0



–



Reface or replace



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



ThreeBond 1386D or Loctite 962T



As required



Valve cap top surface Valve stem seal lip Valve stem and tip Valve guide outer surface Sealing cap holes in cylinder head entire inner surfaces



11-45



CYLINDER HEAD AND VALVE MECHANISM Special tools (Unit: mm) Mark



Tool name and shape



Valve spring compressor adapter plate



Part No.



Application



MD998784



MD998772



Removal and installation of valve cotter



Valve spring compressor (use one of the types shown on the right)



MD999597



Valve stem seal installer A φ18



B C φ15.4 φ6.6



MH063609



Installation of valve stem seal



MD998665



Removal of valve guide



MH063610



Installation of valve guide



Valve guide remover A B φ6.6 φ11.5



Valve guide installer A φ24.5



B φ12



C 16.5



Caulking tool, body A φ6.6



MH063613



Caulking ring, intake valve guide B φ31.5



MH062807



Caulking ring, exhaust valve guide C φ29.5



11-46



MH062808



Installation of valve seat



11 Removal procedure Removal: Valve cotter



• Using and , remove and install the valve cotters according to the following procedure.



• Install mm).



• Install



on the cylinder head using any bolts (M8 × 1.25



on



using any washers and nuts (M6 × 1.0 mm).



11-47



CYLINDER HEAD AND VALVE MECHANISM • Set the stay to a level position. • Adjust the retainer and the mobile nut so that the retainer holder presses down on the valve spring retainer from directly above, and fix them in place with the wing bolt. Adjust the vertical position of the retainer holder by raising or lowering the stay using the nuts.



• Turn the handle clockwise to press down on the valve spring retainer, thus removing the valve cotter.



• Place a wood piece between the valve and to protect the valve from damage. • Using , press down on the upper retainer to remove the valve cotter.



Inspection procedure Inspection: Valve • If the valve is replaced after performing the following inspection, make sure to lap the valve and valve seat. (1) Stem outside diameter • Replace the valve if the measured value is below the limit or is severely worn.



11-48



11 (2) Valve seat angle • Reface the valve if the measured value is not within the standard value range. (3) Valve margin • Reface or replace the valve if the measured value is below the limit.



Refacing of valve • Limit grinding to a necessary minimum. • If the valve margin is below the limit after grinding, replace the valve. • After grinding, make sure to lap the valve and valve seat.



Inspection: Valve stem-to-valve guide clearance • If the clearance exceeds the specified limit, replace the defective part(s).



Replacement of valve guide [Removal]



[Installation] • Measure the diameter of the valve guide mounting hole in the cylinder head. • If the measurement exceeds the specified value, select an oversized valve guide from the table below. • Recondition the valve guide mounting hole to the diameter corresponding to the diameter of the selected oversized valve guide. Available oversize Valve guide inside diameter



0.05



0.25



φ12.05 +0.018 0



φ12.25 +0.018 0



Unit: mm 0.50 φ12.50 +0.018 0



11-49



CYLINDER HEAD AND VALVE MECHANISM • Temporarily place the lower retainer on the cylinder head. Then, install the valve guide until contacts the lower retainer closely.



CAUTION • The valve guides have a specified amount of depth. Make sure to use to achieve the specified depth. • Intake valve guides are longer than exhaust valve guides. Make sure to install the correct type of guide in each location. Inspection: Contact between valve and valve seat • Before starting inspection, check that the valve and valve guide are intact. • Apply an even coat of red lead to the valve contact surface of the valve seat. • Strike the valve once against the valve seat. Do not rotate the valve during this operation.



• If the red lead deposited on the valve indicates a poor contact pattern, take either of the following corrective actions. Contact



Corrective action



Minor defect



Lapping



Serious defect



Refacing or replacement of valve and valve seat



Lapping • Perform lapping according to the following procedure. • Apply a thin coat of lapping compound to the valve seat contact surface of the valve. • Adding a small amount of engine oil to the lapping compound can facilitate even application. • Start with an intermediate-grit compound (120 to 150 grit) and finish with a fine-grit compound (200 grit or more).



CAUTION • Do not put any compound on the stem of the valve. • Strike the valve several times against the valve seat while rotating the valve a little at a time. • Wash away the compound with diesel fuel. • Apply engine oil to the valve contact surface of the valve seat and rub in the valve and valve seat well. • Inspect the contact pattern of the valve and valve seat again. • If the contact pattern is still defective, replace the valve seat.



11-50



11 Inspection: Valve seats • If a valve is corrected or replaced with a new one as a result of the following inspection, make sure to lap the valve and valve seat. (1) Valve seat width • If the measurement exceeds the limit, reface or replace the valve seat.



(2) Valve sinkage from cylinder head bottom surface • Measure the sinkage with the valve seat in intimate contact. • If the measurement exceeds the limit, adjust or replace the defective part(s).



Refacing the valve seat • Grind the valve seat using a valve seat cutter or valve seat grinder. • After grinding, place a piece of sandpaper approximately #400 between the cutter and valve seat and grind the valve seat lightly. • Use a 15° or 75° cutter to cut the valve seat to a width within the standard range. If the valve seat cannot be refaced, replace the valve seat.



CAUTION • Make sure that the valve seat refacing does not cause the valve sinkage to exceed the specified limit. • After refacing, lap the valve and valve seat. Replacement of valve seat [Removal] • The valve seats are installed by expansion fitting. To remove a valve seat, grind inside the metal stock to reduce the wall thickness, then remove the valve seat at room temperature.



11-51



CYLINDER HEAD AND VALVE MECHANISM [Installation] • Measure the inside diameters of the intake and exhaust valve seat holes A and B in the cylinder head. • If the measurement exceeds the specified value, select an oversized valve seat from the table below. • Reface valve seats A and B to the inside diameters of the selected oversizes. Unit: mm Available oversize



0.30



0.60



Intake valve seat mounting hole



Diameter: A



φ31.8 +0.025 0



φ32.1 +0.025 0



Exhaust valve seat mounting hole



Diameter: B



φ29.8 +0.021 0



φ30.1 +0.021 0



• Replace the cylinder head if defects are evident. • Chill the valve seats thoroughly by immersing them in liquid nitrogen. • Install the valve seat until it contacts the cylinder head closely using and (for intake valve seat) or (for exhaust valve seat). • After installing the valve seat, lap the valve seat and valve.



Inspection: Distortion of cylinder head bottom surface • If the distortion exceeds the specified limit, replace the cylinder head.



CAUTION • Make sure that height of the cylinder head from the top surface to the bottom surface is not reduced to a value below the specified limit.



11-52



11 Installation procedure Installation: Sealing cap • Apply sealant to the press fitting hole in the cylinder head. • Install sealing caps and press them in to the depths respectively specified.



Installation: Valve stem seal • Apply engine oil to the valve stem seal lip. • Install the valve stem seal until it contacts the lower retainer closely using . • After installing the valve stem seal, check that the spring of the valve stem seal is deformed or broken.



Installation: Valve cotter • Install the valve cotter in the same manner as in removal. (See “ Removal: Valve cotter”.)



11-53



PISTON AND CONNECTING ROD Disassembly sequence 1 2 3 4



*a: *b:



Lower connecting rod bearing Connecting rod cap Upper connecting rod bearing Piston and connecting rod (See later sections.) Upper crankcase Crankshaft



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • The connecting rod bolts are tightened using the torque-turn method. Any connecting rod bolt that has three marks indicating that it has been tightened three times already must be replaced with a new bolt together with its nut.



Service standards (Unit: mm) Location



Maintenance item



–



Piston projection from upper crankcase top surface (average value)



–



Connecting rod end play



1, 3



* *



1, 3,



4, a



Connecting rod bearing span when free b Connecting rod bearing-to-crankshaft oil clearance Piston-to-crankcase cylinder clearance Bore diameter



*a



Cylinder (upper crankcase) Out-of-roundness Taper



Standard value



Limit



Remedy



-0.209 to 0.035



–



Inspect



0.15 to 0.45



0.5



Replace



–



58.5



Replace



0.022 to 0.055



0.1



Replace



0.105 to 0.125



–



Correct or replace



φ95 to 95.03



φ95.25



Replace



0.005 or less



–



0.015 or less



–



Correct or replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Nut (connecting rod cap installation)



Tightening torque



Remarks



49 {5.0} + 90°



• Wet • Reusable up to three times



Lubricant and/or sealant Mark



Points of application Nut threads Connecting rod bearing inside surface



11-54



Specified lubricant and/or sealant



Quantity



Engine oil



As required



11 Special tools (Unit: mm) Mark



Tool name and shape



Part No.



Application



Piston guide A φ95



MH062226



Installation of piston and connecting rod



Inspection before removal Inspection: Piston projection from upper crankcase top surface



CAUTION • The amount of piston projection affects engine performance and must therefore be inspected without fail. • Set the piston at the top dead center. • Mark reference points A (five points in total) on the top surface of the upper crankcase as shown in the illustration. Using each of the marks as a zero point, measure the amount of piston projection relative to the zero point (height of measurement point B height of reference point A). • Make the measurements at the two measurement points B for each cylinder (eight points in total) using the reference point A nearest to each measurement point, and calculate the average value of all the measurements. • If the average value is out of the standard value range, check the clearance between all relevant parts. • Select and use a cylinder head gasket that can accommodate the average piston projection (average value of the eight measurements). (See the CYLINDER HEAD AND VALVE MECHANISM section.) Inspection: Connecting rod end play • Measure the end play for every connecting rod. • If any measurement exceeds the specified limit, replace the defective part(s).



Inspection procedure Inspection: Connecting rod bearing span when free



CAUTION • Do not attempt to manually expand the bearings. • If the span is less than the specified limit, replace both the upper and lower bearings as a matched set.



11-55



PISTON AND CONNECTING ROD Inspection: Connecting rod bearing-to-crankshaft oil clearance • Fit the lower bearing to the connecting rod cap and the upper bearing to the connecting rod, then tighten the nut to a torque of 49 N·m {5.0 kgf·m}. • Measure the inside diameter of the bearing and the diameter of the crankshaft pin. • If the clearance exceeds the limit, replace the defective part(s). • If a bearing has to be replaced with an undersized one, machine the crankshaft pin to the specified undersize diameter. (See the CRANKSHAFT AND CRANKCASE section.)



Inspection: Piston-to-crankcase cylinder clearance • If the measurement is not within the standard value range, perform one of the steps below according to the condition. A: Measure on cylinder bore in crankcase (in direction of crankshaft axis) B: Measure on cylinder bore in crankcase (in direction perpendicular to crankshaft axis) C: Measure on piston (in direction perpendicular to piston pin hole) • If the crankcase cylinder bore diameter exceeds the specified limit, rebore all the cylinders to an oversize diameter and replace the pistons and piston rings with the corresponding oversized ones.



CAUTION • If any one cylinder is found to be defective and must be rebored, all the other cylinders must also be rebored to the same oversize. • If the cylinder bore diameter is within the standard value range, replace the piston and piston rings. Selection of oversized piston • Available oversizes: 0.50 mm and 1.00 mm (two sizes) • Measure the bore diameter of each cylinder. Select the appropriate oversized piston based on the largest of the measurements. • Measure the outside diameter of the chosen oversized piston. • Rebore each cylinder to a diameter at which the piston-to-cylinder clearance will be within the standard value range.



CAUTION • Rebore the cylinder in the following order to prevent the generated heat from causing distortion in the crankcase. No. 2→No. 4→No. 1→No. 3



11-56



11 Reboring diameter (tolerance ± 0.005) = Oversized piston diameter (measured value) + Piston-to-cylinder clearance (median of service standard value range) – 0.02 mm (honing margin) • After boring the cylinders, hone them to the finish dimension (tolerance ± 0.005). Finish dimension (tolerance ± 0.005) = Oversized piston diameter (measured value) + Piston-to-cylinder clearance (median of service standard value range) • Honing finish surface roughness: 1.2 to 3.5 µm • Honing cross hatch angle: 20° ± 5° (semi angle) • Cylinder bore out-of-squareness: 0.05 mm • Measure the piston-to-cylinder clearance.



Installation procedure Installation: Connecting rod bearings



CAUTION • Do not reverse the positions of the lower bearing and the upper bearing (with oil hole) when installing, as this may cause seizure in the engine.



• Select and use a bearing set of a thickness that can accommodate the inside diameter of the connecting rod’s large end and the diameter of the crankshaft pin. Use either of the following methods for the selection. (1) Measurement based selection • Install the connecting rod cap on the piston and connecting rod assembly without fitting the lower and upper bearings. • Tighten the nut to 49 N·m {5.0 kgf·m}. • Measure the inside diameter of the connecting rod’s large end (vertically from one point), and the outside diameter of the crankshaft pin (vertically or horizontally from one point). • Select a bearing set that matches the measurements from the table below. If the color identification mark is indiscernible, measure the thickness of the bearing walls and use the measurements in its place. Unit: mm Diameter of crankshaft pin φ54 -0.012 -0.020 φ54 -0.020 -0.029



Bearing



Inside diameter of connecting rod large end



Color identification mark



Thickness



φ58 +0.019 +0.010



Colorless



2 -0.001 -0.005



φ58 +0.010 0



Blue



2 -0.005 -0.009



φ58 +0.019 +0.010 φ58 +0.010 0



Yellow



2 +0.003 -0.001



Colorless



2 -0.001 -0.005



11-57



PISTON AND CONNECTING ROD (2) Color identification mark based method • Use selection by identification color for new parts. • The connecting rods, crankshafts, and bearings can be appropriately combined in the following ways according to their color identification marks: Crankshaft color identification mark ( ): identification mark Colorless (“1”) Blue (“2”)



Connecting rod color identification mark Colorless Blue



Bearing color identification mark Colorless Blue Yellow



Each crankshaft also has an identification mark (“1” or “2”) indicating the diameter of each pin.



Installation: Piston and connecting rod



CAUTION • Before installing the piston and connecting rod, check the punch marks on each nut’s top surface. The nut and its bolt can be reused if there are two or less punch marks. • The punch marks indicate the number of times each bolt has been tightened using the torque-turn tightening method. Any connecting rod bolt and nut that already has three punch marks must be replaced. • Check that the piston ring end gaps are in their correct positions. A: 1st compression ring end gap B: 2nd compression ring end gap C: Oil ring end gap D: Oil ring expander spring end gap Front mark on piston: “ ”



• If the cylinder has not been machined to an oversize, check that the size marks (“A”, “B” or “C”) on the piston and the upper crankcase are the same. • Cover the connecting rod bolts with vinyl hoses to prevent them from scratching the wall surface of the cylinder in the upper crankcase and the crankshaft pin.



11-58



11 • Face the front mark “ ” of the piston toward the front of the engine and install the piston.



CAUTION • Make sure that the piston and connecting rod do not hit the oil jet during installation.



• After installing the piston and connecting rod assembly, align the mating marks on the connecting rod and connecting rod cap and tighten the nuts alternately in the following manner. • Tighten the nut to a torque of 49 N·m {5.0 kgf·m}. • After tightening, tighten the nut further by 90 degrees to the right. Put a punch mark on the nut’s top surface to indicate the number of times it has been used.



CAUTION • The nuts that have been tightened using the torque-turn method must never be additionally tightened after the final angular tightening.



11-59



PISTON AND CONNECTING ROD Piston and Connecting Rod



Disassembly sequence 1 2 3 4 5 6 7 8 9



1st compression ring 2nd compression ring Oil ring Snap ring Piston pin Connecting rod bushing Connecting rod bolt Connecting rod Piston



: Non-reusable parts



CAUTION • Do not remove the connecting rod bolt unless defects are evident.



Assembly sequence Follow the disassembly sequence in reverse.



Service standards (Unit: mm) Location



Maintenance item 1st compression ring



1 to 3



Piston ring end gap



2nd compression ring Oil ring



Piston ring side clearance 1 to 3, 9 in piston groove



Standard value



Limit



Remedy



0.4 +0.05 –0.1 0.5 +0.05 –0.1



1.5



Replace



0.4 ± 0.1



1st compression ring



0.11 to 0.16



2nd compression ring



0.065 to 0.105



Oil ring



0.025 to 0.065



0.2 0.15



Replace



5, 6



Piston pin-to-connecting rod bushing clearance



0.028 to 0.049



0.1



Replace



5, 9



Piston pin-to-piston clearance



0.007 to 0.021



0.05



Replace



Bend



–



0.05



Twist



–



0.1



8



Connecting rod



Replace



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Piston pin outside surface Connecting rod bushing outside surface Connecting rod bolt knurled surface Connecting rod bushing fitting surface of connecting rod



11-60



11 Special tools (Unit: mm) Mark



Tool name and shape



Part No.



Application



Piston ring tool



MH060014



Removal and installation of piston rings



Connecting rod bushing puller kit



MH062575



Removal and installation of connecting rod bushings



Removal procedure Removal: Piston ring



Removal: Piston pin • Remove the piston pin by striking it with a rod and hammer. • If the piston pin is difficult to remove, first heat the piston in hot water or with a piston heater.



Inspection procedure Inspection: Piston ring end gap • Using the crown of a piston, push the piston ring horizontally into a cylinder in the crankcase until it reaches the lower part of the cylinder, where there is relatively small wear. • Taking care not to move the piston ring, measure the end gap. • If any of the rings has a gap exceeding the specified limit, replace all the piston rings as a set.



11-61



PISTON AND CONNECTING ROD Inspection: Piston ring side clearance in piston groove • Remove any carbon deposits from the ring groove in the piston before measurement. • Measure the side clearance of each ring around the piston’s entire periphery. • The 1st compression ring is a full-keystone type. Measure the side clearance for this compression ring with a feeler gauge while pressing the ring against the piston with a straight edge. • If any of the measurements exceeds the specified limit, replace the defective part(s). If any of the piston rings is defective, replace all the rings on the piston as a set.



Inspection: Piston pin-to-piston clearance • If any of the measurements exceeds the specified limit, replace the defective part(s).



Inspection: Piston pin-to-connecting rod bushing clearance • If any of the measurements exceeds the specified limit, replace the bushing.



11-62



11 Replacement of connecting rod bushing • Replace the connecting rod bushing using . [Removal] • Remove the upper rod bearing (if fitted) from the large end of the connecting rod. • Mount the connecting rod on the base and lock it in position with the bracket and plate. • Fit collar A over the puller with its ends facing in the illustrated directions. Then, slowly apply a pressure of approximately 49 kN {5000 kgf} to the puller with a press to force out the connecting rod bushing.



[Installation] • Apply engine oil to the outside surface of the connecting rod bushing and the bushing fitting surface of the connecting rod. • Fit collar B, the bushing, and collar A over the puller in the illustrated directions and lock this arrangement together with the nut. • Align the oil holes in the connecting rod bushing and the connecting rod. Then, use a press to slowly apply a pressure of approximately 49 kN {5000 kgf} to the puller until the bushing is forced into place. • After press-fitting the connecting rod bushing, measure the clearance between the piston pin and connecting rod bushing. • If the measurement is less than the standard clearance range, ream the bushing.



11-63



PISTON AND CONNECTING ROD Inspection: Connecting rod bend and twist • Mount the connecting rod on the connecting rod aligner. Also mount the connecting rod bearings, piston pin, and connecting rod cap to create the same conditions as are expected when the connecting rod is mounted on a crankshaft. Tighten the nuts of the connecting rod bearing cap to a torque of 49 N·m {5 kgf·m}. • Measure the extent of bend and twist in the connecting rod. • If either measurement exceeds the specified limit, replace the connecting rod.



Installation procedure Installation: Connecting rod bolts • Check that there are no burrs or other defects on the surface of the connecting rod bolt holes. Replace the connecting rod if defects are evident. • Apply engine oil to the knurled surface of the connecting rod bolt. Then, install the bolt by using a press to apply a pressure of approximately 4.9 kN {500 kgf} at the maximum with the cuts of the bolt head facing in the illustrated direction.



Installation: Piston and connecting rod • Install pistons and connecting rods as follows when replacing them. • All the cylinders used in the same engine must be the same in weight. • If the cylinder has not been machined to an oversize, check that the size marks of piston and upper crankcase (“A”, “B” or “C”) are the same. The piston size for each cylinder is shown on the upper crankcase.



CAUTION • If the size of installed piston is different from the piston size shown on the upper crankcase, the engine is caused to seize up. • Apply engine oil to the piston pin, and assemble the piston and connecting rod with their marks facing in the illustrated directions. • If the piston is difficult to insert, heat the piston in hot water or with a piston heater.



11-64



11 Installation: Piston rings • With the manufacturer’s mark (found near the piston ring end gaps) facing up, install the piston rings so that the end gap of each ring is positioned as illustrated. A: 1st compression ring end gap B: 2nd compression ring end gap C: Oil ring end gap D: Oil ring’s expander spring end gap “ ”: Front mark on piston The manufacturer’s marks are present only on the 1st and 2nd compression rings.



11-65



FLYWHEEL Disassembly sequence 1 2 3 4



Washer Pilot bearing Ring gear Flywheel



: Locating pin • Do not remove the pilot bearing and ring gear unless defects are evident.



Assembly sequence Follow the disassembly sequence in reverse. • Make sure that there are no foreign substances, oil and other harmful flaws on the flywheel mounting surface.



Service standards (Unit: mm) Location 3



Maintenance item Wear of the ring gear Friction surface runout (when fitted)



4



Flywheel



Friction surface height Friction surface distortion Friction surface parallelism



Standard value



Limit



Remedy



–



1.0



Replace



0.05



0.2



Rectify or replace



22.8



21.8



Replace



0.05 or less



0.2



Rectify or replace



0.1



–



Rectify or replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (flywheel installation)



Tightening torque



Remarks



39 {4.0} + 30°



• Wet • Reusable up to three times



Lubricant and/or sealant Mark



Points of application Bolt threads



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Inspection before removal Inspection: Flywheel friction surface runout • If the runout exceeds the specified limit, check that the bolts are tightened correctly and that there are no abnormalities on the crankshaft mounting surface, then rectify or replace the flywheel.



11-66



11 Inspection procedure Inspection: Wear of the ring gear [Inspection] • If the measurement exceeds the limit, replace the ring gear.



Replacement of the ring gear [Removal] • Heat the ring gear evenly with a gas burner or the like until it reaches approximately 200°C, then remove it from the flywheel.



WARNING • Never touch the heated ring gear, otherwise you may burn yourself. [Installation] • Heat the ring gear evenly with a gas burner or the like until it reaches approximately 200°C.



WARNING • Never touch the heated ring gear, otherwise you may burn yourself. • Fit the ring gear with the side having non-chamfered tooth edge toward the flywheel. Inspection: Flywheel (1) Friction surface height • If the height is below the specified limit, replace the flywheel.



(2) Friction surface distortion • If the measured amount is above the specified limit, rectify or replace the flywheel.



11-67



FLYWHEEL Rectification of flywheel • Rectify the friction surface so that its height is not below the specified limit, and it is parallel with surface A with an error not exceeding 0.1 mm.



Installation procedure Installation: Flywheel



CAUTION • Before fitting the flywheel mounting bolts, check the punch marks on each bolt’s head. (Bolts with one or two punch marks can be used.) • The number of punch marks indicates the number of times the flywheel mounting bolt has been tightened using the torque-turn method. Any bolt that has three marks (indicating that the bolt has been tightened three times already) must be replaced with a new one. • Tighten the flywheel mounting bolts to a torque of 39 N·m {4.0 kgf·m}. • After installing, give the bolts a further 30° turn clockwise to tighten up, then provide a punch mark on the head of each bolt to indicate the number of times of its use.



CAUTION • The bolts should be tightened within the plastic region. Never tighten them further than the specified angle. Installation: Washer • Install the washer in the illustrated position.



11-68



11 M E M O



11-69



TIMING GEAR CASE



Disassembly sequence 1 2 3 4 5 6 7



Eyebolt Oil pipe Vacuum pump (See Gr35.) O-ring Power steering pipe Hose Power steering oil pump (See Gr37.)



8 9 10 11 12 13 14 15



Assembly sequence Follow the disassembly sequence in reverse.



11-70



O-ring Water pump O-ring Cylinder recognition sensor O-ring Crankshaft pulley Spacer Insulator



16 17 18 19 20



Bracket B Bracket A Front oil seal Plate Timing gear case



: Locating pin : Non-reusable parts



11 Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Eyebolt (oil pipe mounting) Bolt (vacuum pump mounting) Nut (timing gear case mounting) Nut (power steering pipe mounting) Bolt (crankshaft pulley mounting) Bolt (cylinder recognition sensor mounting) Bolt (plate mounting)



Tightening torque



Remarks



20 {2.0}



–



23 {2.4}



–



29.4 to 39.2 {3 to 4}



–



323 {33.0}



Wet



8 {0.8}



–



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



ThreeBond 1207C



As required



Soapy water



As required



O-ring Front oil seal lip Bolt threads Timing gear case mounting surface Plate mounting surface of timing gear case O-ring



Installation procedure Installation: [Installation] • Clean the sealant application surface of the plate and timing gear case. • Apply a bead of sealant to the plate mounting surface of the timing gear case evenly and without any breaks. • Install the plate within 15 minutes of applying the sealant, being careful not to dislodge the sealant.



CAUTION • If the plate mounting bolts are subsequently loosened or removed, be sure to apply sealant again upon reassembly. [Inspection] • Perform the inspection one hour after the timing gear case is installed to the timing gear case. • Plug the hole A in the timing gear case. • Apply the nozzle of an air gun to the hole B in the plate, then immerse the timing gear case in a container of water while applying an air pressure of 15 kPa {0.2 kgf/cm2} into it. • If air bubbles come out from the plate fitting surface, reinstall the plate. • After the inspection, unplug the hole A and drain water, if trapped, from the timing gear case.



11-71



TIMING GEAR CASE Installation: Front oil seal • Install the front oil seal with its ends facing as illustrated so that end surface A of the oil seal is flush with end surface B of the timing gear case.



Installation: Timing gear case • Clean the sealant application surface of each part. • Apply a bead of sealant to the front plate mounting surface of the timing gear case evenly and without any breaks. • Install the timing gear case within 15 minutes of applying the sealant, being careful not to dislodge the sealant.



CAUTION • Do not run the engine within one hour of mounting the timing gear case. • If the timing gear case mounting nuts or bolts are loosened or removed, be sure to reapply sealant.



11-72



11 M E M O



11-73



TIMING GEAR



Disassembly sequence 1 2 3 4 5 6 7 8 9 10 11



Upper guide plate Cam sprocket Timing chain Tension lever Tension lever shaft Lower guide plate Guide plate Oil jet Idler washer Idler sprocket bushing Idler gear and sprocket



12 Idler shaft 13 Chain support



*a: *b: c: *d: * e: *



Crankshaft gear Supply pump gear Idler gear B Oil pump gear Front plate



: Locating pin : Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse. • After tightening the tension lever shaft mounting bolt, check that the tension lever moves smoothly. • The idler shaft also serves as a locating component for the front plate.



11-74



11 Service standards (Unit: mm) Location



–



Maintenance item



Backlash between gears



Standard value



Limit



Oil pump gear and crankshaft gear



0.098 to 0.158



0.3



Crankshaft gear and idler gear and sprocket



0.082 to 0.142



0.3



Idler gear and sprocket and idler gear B



0.096 to 0.156



0.4



0.05 to 0.20



0.3



Replace



16.5



9



Replace



–



Idler gear and sprocket end play



3



Elongation of timing chain (clearance between chains with tension lever pressed)



Remedy



Replace



4, 5



Tension lever-to-tension lever shaft clearance



0.06 to 0.18



0.3



Replace



10, 12



Idler sprocket bushing-to-idler shaft clearance



0.02 to 0.06



0.1



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



40 {4.1}



Wet



44 {4.4}



Wet



45 to 55 {4.6 to 5.6}



–



Bolt (tension lever shaft mounting) Bolt (idler shaft mounting) Bolt (chain support mounting)



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Timing chain sliding surfaces Bolt threads Tension lever shaft mounting surface of tension lever Idler sprocket bushing inner surface Idler shaft outer surface



Special tools (Unit: mm) Mark



Tool name and shape



Cam sprocket holder kit



Part No.



MH063490



Supporting the cam sprocket



MH062462



Removal and installation of idler sprocket bushing



Idler sprocket bushing puller A φ41.5



B φ46



C φ42



Application



11-75



TIMING GEAR Inspection before removal Inspection: Timing chain elongation • Support the cam sprocket with



.



• Align the inscribed lines on the adjusting plate and the nut to adjust the exhaust cam sprocket and the intake cam sprocket positions to their normal installed positions. • Push the tension lever by hand to make the timing chain taut. • Measure the amount of elongation of the timing chain (smallest distance between the two chain portions). • Replace the timing chain if the measured distance is below the specified limit.



Inspection: Backlash between gears • For each pair of gears, measure the backlash for at least three teeth. • If any of the measurements exceeds the specified limit, replace the defective part(s).



Inspection: Idler gear and sprocket assembly end play • If the measurement exceeds the specified limit, replace the defective part(s).



11-76



11 Inspection procedure Inspection: Tension lever • Check the timing chain sliding surface and point of contact of the tension lever for cracking or flaking. • Replace the tension lever if defects are evident.



Inspection: Tension lever-to-tension lever shaft clearance • Replace the defective part(s) if the clearance exceeds the specified limit.



Inspection: Guide plate • Check the timing chain sliding surface of the guide plate for cracking or flaking. • Replace the guide plate if defects are evident.



Inspection: Idler sprocket bushing-to-idler shaft clearance • Replace the bushing if the clearance exceeds the specified limit.



Replacement of idler sprocket bushing [Removal]



11-77



TIMING GEAR [Installation] • Place the idler gear and sprocket with its ends facing as illustrated. • Install the bushing until sits on the chamfered end of the idler gear and sprocket. • After installation, measure the clearance again. • If the measurement is below the specified limit, ream the bushing.



Installation procedure Installation: Idler gear and sprocket • Install the idler gear and sprocket on the idler shaft while aligning the marks “1” on its teeth with the corresponding mark on one of the crankshaft gear teeth.



Installation: Timing chain • Support the cam sprocket with . • Check that the idler gear and sprocket and the crankshaft gear are engaged at the “1” marked teeth. • Align the “ ” mark on the idler gear and sprocket with the mark link plate (one plate) on the timing chain.



CAUTION • The timing chain has mark link plates in two locations (one with one mark link plate and the other with two mark link plates). Do not confuse the two locations when carrying out this procedure. • Install the timing chain with the mark link plates (two plates) aligned with the “ ” marks on the exhaust cam sprocket and intake cam sprocket. • After installing the timing chain, install the idler washer so that the front mark “F” is facing forward.



11-78



11 M E M O



11-79



CRANKSHAFT AND CRANKCASE



11-80



11 Disassembly sequence 1 2 3 4 5 6 7 8



9 10 11 12 13 14 15 16



Front plate Stiffener Rubber spacer Dust cover Rear plate Rear oil seal Rear oil seal case Stiffener RH



17 Crankshaft 18 Upper main bearing 19 Upper crankcase



Stiffener LH Main cap bolt Lower main bearing Lower crankcase Lower thrust plate Upper thrust plate Crankshaft gear Key



: Locating pin : Non-reusable parts



CAUTION • The lower crankcase and upper crankcase are manufactured as paired parts, and therefore must always be replaced as a set.



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • The main cap bolts are tightened using the torque-turn tightening method. Any bolt that has three punch marks must be replaced with a new one.



Service standards (Unit: mm) Location –



Maintenance item Crankshaft end play



11, 17, 18



Main bearing-to-crankshaft oil clearance



11, 18



Main bearing span when free



17



Crankshaft



0.4



Adjust



0.15



Replace



–



73.16



Replace Replace



0.072 to 0.1 0.02 or less



0.05



Out-of-roundness



0.01 or less



–



Taper



0.006 or less



–



52.05 ± 0.05



–



27.5



–



30



–



No. 1 No. 2 to 4



30 +0.039 0



–



35 +0.2 0



–



Fillet



R3.5



–



Top surface distortion



0.01



0.07



Pin width



19



0.10 to 0.28 No. 3



No. 5



Upper crankcase



Remedy



0.032 to 0.06



Center-to-center distance between journal and pin Journal width



Limit



All except No. 3



Bend Pins and journals



Standard value



Cylinder



Out-of-roundness



0.005 or less



–



Taper



0.015 or less



–



Rectify or replace



Rectify or replace Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (lower crankcase mounting) Main cap bolt (lower crankcase mounting)



Tightening torque



Remarks



25 {2.5}



–



20 {2.0} + 90° + 90°



• Wet • Reusable up to three times



11-81



CRANKSHAFT AND CRANKCASE Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



ThreeBond 1217H



As required



ThreeBond 1207C



As required



Rear oil seal lip Main cap bolt threads and seating surfaces Main bearing inside surface Lower crankcase mounting surface of upper crankcase Upper and lower crankcase mounting surfaces of rear oil seal case Front plate mounting surfaces of upper crankcase and lower crankcase



Special tools Mark



Tool name and shape



Part No.



Gear puller



MH062469



Application



Removal of crankshaft gear



Inspection before removal Inspection: Crankshaft end play • If the measurement exceeds the specified limit, replace the thrust plates with oversized ones. Available oversizes: +0.15 mm, +0.30 mm, +0.45 mm • Replace the crankshaft if the end play is too large to adjust using oversized thrust plates.



Removal procedure Removal: Lower crankcase • Loosen the bolts in several passes in the order indicated in the illustration (1 to 16). • After loosening the bolts, loosen the main cap bolts in several passes in the order indicated in the illustration (17 to 26), then remove the main cap bolts.



Removal: Crankshaft gear



CAUTION • Attach a plug (M16 × 1.5 mm, length 30 mm) on the end of the crankshaft to prevent any damage by . • Do not tap off the crankshaft gear as this can damage it.



11-82



11 Inspection procedure Inspection: Main bearing span when free



CAUTION • Do not attempt to manually expand the bearings. • If the measurement is below the specified limit, replace both the upper and lower bearings as a set.



Inspection: Main bearing-to-crankshaft oil clearance • Fit the upper bearing into the upper crankcase and the lower bearing into the lower crankcase. • Tighten the main cap bolts to a torque of 20 N·m {2.0 kgf·m}. • Measure the inside diameter of the main bearing and the diameter of the corresponding crankshaft journal. • If the difference between the measurements exceeds the specified limit, machine the crankshaft journal to one of the specified undersized dimensions.



Inspection: Crankshaft [Inspection] (1) Bend • Support the crankshaft at its No. 1 journal and No. 5 journal. Measure the extent of bending in the crankshaft at the center of the No. 3 journal. A half of the dial gauge reading obtained as the crankshaft is rotated by a full turn represents the bend of the crankshaft. • If the measurement exceeds the specified limit, replace the crankshaft. (2) Out-of-roundness and taper of crankshaft journals and pins • If any of the measurements exceeds the specified limit, grind the crankshaft journal(s) and/or pin(s) to undersize(s) or replace the crankshaft.



11-83



CRANKSHAFT AND CRANKCASE Grinding of crankshaft



CAUTION • If the crankshaft is ground to an undersize, the main bearings must be replaced with the undersized ones of the corresponding undersize. • Make sure of necessary undersize dimensions in the maintenance standard table and carry out grinding work in accordance with the following procedure. • Do not change the center-to-center distance A between the journal and pin. • Do not change the journal width B and the pin width C. • Finish the fillets D smoothly. • Carry out a magnetic inspection to check for cracks possibly caused by grinding. Also, check that the hardness of the surface has not dropped below Shore hardness number (Hs) 75. • Replace the crankshaft if defects are evident.



Crankshaft undersize dimensions (Unit: mm) Undersizes 0.25



0.50



0.75



1.00



Finished journal diameter



67.711 to 67.728



67.461 to 67.478



67.211 to 67.228



66.961 to 66.978



Finished pin diameter



53.721 to 53.738



53.471 to 53.488



53.221 to 53.238



52.971 to 52.988



Out-of-roundness



0.01 or less



Taper



0.006 or less



• When grinding, turn both the crankshaft and the grinder counterclockwise as viewed from the crankshaft front end. • When finishing the crankshaft with whetstone or sandpaper, rotate the crankshaft clockwise.



Inspection: Distortion of upper crankcase top surface • If the measurement exceeds the specified limit, grind the crankcase top surface with a surface grinder. • Limit the amount of removed metal to make sure that the amount of piston projection above the crankcase top surface stays within the standard value range. (See the PISTON AND CONNECTING ROD section.)



11-84



11 Installation procedure Installation: Crankshaft gear • Heat the crankshaft gear to approximately 170 ± 10°C with a gas burner or the like.



WARNING • Be careful not to get burned. • Align the key fitted in the crankshaft with the slot in the crankshaft gear. Drive the gear into position by lightly striking its end face with a plastic hammer. Installation: Thrust plates • Install the thrust plates on the rearmost main bearings with the oil grooves on the inner plates facing inward and those on the outer plates outward as shown in the illustration.



CAUTION • Be sure to orient the oil grooves of the thrust plates as indicated above, otherwise seizures may occur in the engine. • Use oversized thrust plates when adjusting the crankshaft end play. The upper and lower thrust plates on the same side must be of the same size. The thrust plates on one side may differ in size from those on the other side. Installation: Main bearings



CAUTION • The upper main bearing has an oil hole while the lower main bearing does not. Do not confuse the two, as incorrect installation can cause seizures in the engine.



• Select and use a main bearing set of a thickness that can accommodate the inside diameter of each main bearing fitting hole between the upper crankcase and lower crankcase and the diameter of the corresponding crankshaft journal. Select the appropriate main bearing set by one of the following two methods. (1) Measurement based selection • Mount the lower crankcase on the upper crankcase without fitting main bearings. • Tighten the main cap bolts to 20 N·m {2.0 kgf·m}. • Measure the inside diameter of the main bearing fitting hole between the upper crankcase and lower crankcase (vertically from one point), and the diameter of the crankshaft journal (vertically or horizontally from two points).



11-85



CRANKSHAFT AND CRANKCASE • Select a main bearing set that matches the measurements from the table below. If the color identification mark is indiscernible, measure the thickness of the bearing walls and use the measurements in its place.



(Unit: mm) Crankshaft Diameter of journal



Upper crankcase and lower crankcase Inside diameter of main bearing fitting hole



Main bearing Color identification mark



72 +0.019 +0.010



Black



68 –0.022 –0.030 72 +0.010 0



Blue



72 +0.019 +0.010



Yellow



68 –0.030 –0.039 72 +0.010 0



Black



Journal No.



Thickness



No. 1, 2, 4, 5



2 –0.001 –0.005



No. 3



2 –0.021 –0.025



No. 1, 2, 4, 5



2 –0.005 –0.009



No. 3



2 –0.025 –0.029



No. 1, 2, 4, 5



2 +0.003 –0.001



No. 3



2 –0.017 –0.021



No. 1, 2, 4, 5



2 –0.001 –0.005



No. 3



2 –0.021 –0.025



(2) Color identification mark based selection • Use selection by identification color for new parts. • The crankshaft, upper crankcase, and main bearing can be appropriately combined in the following ways according to their color identification marks: 1J: Position of color identification mark on No. 1 journal 2J: Position of color identification mark on No. 2 journal 3J: Position of color identification mark on No. 3 journal 4J: Position of color identification mark on No. 4 journal 5J: Position of color identification mark on No. 5 journal Crankshaft color identification mark Colorless Blue



Upper crankcase identification mark A B



Main bearing Black Blue Yellow



Installation: Lower crankcase



CAUTION • Before installing the main cap bolt, check the punch marks on each bolt’s head. (Bolts with one or two punch marks can be reused.) • The punch marks indicate the number of times each main cap bolt has been tightened using the torque-turn tightening method. Any main cap bolt that already has three punch marks (the bolt has already been tightened three times) must be replaced.



11-86



11 • Clean the sealant application surfaces of each part. • Apply a bead of sealant to the upper crankcase evenly and without any breaks as shown in the illustration. • Install the lower crankcase within three minutes of applying the sealant to the upper crankcase, being careful not to dislodge the sealant.



• Apply engine oil to the threads and seating surface under the head of each of the main cap bolts, and tighten the bolts to a torque of 20 N·m {2.0 kgf·m} in the order indicated in the illustration (1 to 10). • Then, tighten the main cap bolts further by 90° in the same order. • Tighten them by another 90° in the same order. • After completing tightening of the main cap bolts, tighten the bolts (11 to 26) to the specified torque in the order indicated in the illustration.



CAUTION • Do not run the engine within one hour after installing the bolts. • Reapply sealant to the upper crankcase if the bolts or main cap bolts are loosened or removed. • After tightening the main cap bolts using the torque-turn tightening method, make a punch mark on the head of each main cap bolt to indicate the number of times it has been used.



CAUTION • The main cap bolts are tightened using the torque-turn tightening method and must never be additionally tightened after the final angular tightening. • After installing the lower crankcase, check that the crankshaft can be rotated lightly by hand. Inspect the main bearing cap fitting holes if the crankshaft does not rotate smoothly. Installation: Rear oil seal • Install the rear oil seal in the rear oil seal case in the illustrated direction until the end surface of the oil seal is flush with the end surface of the rear oil seal case.



11-87



CRANKSHAFT AND CRANKCASE Installation: Rear oil seal case • Apply engine oil to the rear oil seal lip. • Clean the sealant application surface. • Apply a bead of sealant to the rear oil seal case evenly and without any breaks as shown in the illustration. • Install the rear oil seal case on the crankcase assembly within three minutes of applying the sealant, being careful not to dislodge the sealant.



CAUTION • Do not run the engine within one hour after installing the rear oil seal case. • Reapply sealant to the rear oil seal case if any of the bolts is loosened or removed.



Installation: Front plate • Clean the sealant application surfaces of each part. • Apply a bead of sealant to the upper crankcase and lower crankcase evenly and without any breaks as shown in the illustration. • Install the front plate within three minutes of applying the sealant, being careful not to dislodge the sealant.



CAUTION • Do not run the engine within one hour after installing the front plate. • Reapply sealant to the upper crankcase and lower crankcase if any of the bolts is loosened or removed. All the bolts except the bolt shown in the illustration are for fastening both the front plate and timing gear case. Use any suitable bolts in place of these bolts to keep the front plate temporarily in place until the timing gear case is installed.



11-88



GROUP 12 LUBRICATION SPECIFICATIONS.............................................................................. 12-2 STRUCTURE AND OPERATION 1. Lubrication System...................................................................... 12-3 2. Oil Pump ...................................................................................... 12-4 3. Oil Cooler and Oil Filter ............................................................... 12-5 4. Oil Filter ........................................................................................ 12-6 5. Engine Oil Pressure Switch .......................................................... 12-7 6. Lubrication of Engine Components .............................................. 12-7 TROUBLESHOOTING ...................................................................... 12-11 ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Oil Filter Replacement ............................................................... 2. Engine Oil Replacement ............................................................ 3. Oil Pressure Measurement......................................................... 4. Engine Oil Level Inspection .......................................................



12-12 12-14 12-15 12-16



OIL PAN, OIL STRAINER AND OIL JET.......................................... 12-18 OIL PUMP ........................................................................................ 12-20 OIL COOLER AND OIL FILTER ...................................................... 12-22



12-1



SPECIFICATIONS Item



Specifications



Method of lubrication



Forced lubrication by oil pump



Oil filter



Spin-on filter paper type



Oil cooler



Shell and plate type (multiple-plate type) API classification CJ-4, JASO classification DH-2 or ACEA classification E6



Grade



Engine oil



Viscosity (application/SAE viscosity number) Quantity



dm3 {L}



Below 0°C



10W-30



Above –15°C



15W-40



Above 30°C



40



Oil pan



6.5 {6.5}



Oil filter



1 {1} 2}



Regulator valve opening pressure



kPa {kgf/cm



Bypass valve opening pressure



kPa {kgf/cm2}



Relief valve opening pressure



12-2



kPa {kgf/cm



2}



620 ± 30 {6.3 ± 0.3} 490 ± 30 {5 ± 0.3} 883 ± 98 {9 ± 1}



12



STRUCTURE AND OPERATION 1. Lubrication System



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16



Main oil gallery Bypass valve Bypass valve Regulator valve Engine oil pressure switch Oil cooler Full-flow filter element Bypass filter element Relief valve Oil pump Oil strainer Turbocharger Oil jet Timing chain Idler bushing Timing gear



17 18 19 20 21 22 23 24 25 26 27 28 29 30



Oil jet Crankshaft main bearing Connecting rod bearing Connecting rod bushing Piston Supply pump idler gear bushing Supply pump idler gear shaft Vacuum pump Chain tensioner Camshaft journal (No. 1) Camshaft journal (No. 2 to No. 5) Pivot bolt Valve mechanism Oil pan



A: Orifice



12-3



STRUCTURE AND OPERATION 2. Oil Pump



• This engine uses a gear-type oil pump driven by the rotation of the crankshaft transmitted through the engagement of the crankshaft gear and the oil pump gear. • The oil pump has a relief valve (containing a steel ball and relief valve spring), which prevents excessive pressure from building up inside the lubricating system by allowing part of the engine oil to escape to the oil pan when the oil pressure exceeds a specified level.



12-4



12 3. Oil Cooler and Oil Filter



3.1 Bypass valve • When the engine oil is cool and its viscosity is high, or when the oil cooler element becomes clogged and restricts the flow of the engine oil, the bypass valve opens to let the engine oil bypass the oil cooler and flow directly to the oil filter.



12-5



STRUCTURE AND OPERATION 3.2 Regulator valve • When the oil pressure in the main oil gallery exceeds the specified level, the regulator valve opens to adjust the oil pressure by allowing part of the engine oil to escape to the oil pan.



4. Oil Filter • This oil filter is a spin-on paper-filter type that incorporates both a bypass filter and a full-flow filter. • A bypass valve is installed in the lower part of the oil filter. When the filter elements are clogged, this valve opens to let the engine oil bypass the filter elements and flow directly to the main oil gallery, thereby preventing seizures in the engine.



12-6



12 5. Engine Oil Pressure Switch • When the pressure of the engine oil to the main oil gallery drops below the specified level, an electrical contact inside the engine oil pressure switch closes. • This causes a warning lamp on the meter cluster to illuminate and notify the operator of the excessive pressure drop.



6. Lubrication of Engine Components • The engine oil in the main oil gallery lubricates the engine components in the following ways.



6.1 Main bearing and connecting rod bearing



• Engine oil supplied through an oil passage in the crankshaft lubricates the large end (connecting rod bearing) of each connecting rod. Simultaneously, engine oil supplied through an oil passage in the connecting rod lubricates the connecting rod’s small end.



12-7



STRUCTURE AND OPERATION 6.2 Valve mechanism • The engine oil flows from the main oil gallery to the oil passages in the cylinder head to lubricate every journal on the camshaft, and then returns to the oil pan. • Engine oil flows from the cylinder head to the oil passages in the pivot bolt and the adjusting screw to lubricate the rocker arms and camshaft.



12-8



12 6.3 Check valves and oil jets • An oil jet is fitted in the lower part of the subgallery for each cylinder. • Engine oil is sprayed out of the oil jet into the piston to cool the piston. • Each oil jet is fitted with a check valve that opens and closes at predetermined oil pressure levels. At low engine speeds, the check valve closes to maintain the required volume of oil in the lubrication system and prevent reductions in oil pressure.



6.4 Vacuum pump • Engine oil flows to the vacuum pump through the oil pipe to lubricate the pump vanes. • The used engine oil is discharged from the oil outlet port and returns to the oil pan.



6.5 Idler shaft • The idler sprocket bushing is lubricated by the engine oil fed through the oil passage in the idler shaft.



6.6 Timing chain • The timing chain is lubricated by the engine oil spouted from the oil injection hole of the oil jet fitted to the idler shaft.



12-9



STRUCTURE AND OPERATION 6.7 Turbocharger • Engine oil is fed to the bearing housing from the main oil gallery through the oil pipe to lubricate the inside of the turbocharger. • The piston rings, which are installed on both sides of the turbine wheel shaft, serve as oil seals.



12-10



12



TROUBLESHOOTING



Low oil pressure



Excessive oil consumption (oil leakage)



Incorrectly mounted element



O



O



O



Defective gasket



O



O



O O



Engine is difficult to start



Overheating



Symptoms



Possible causes



Oil cooler



Defective O-ring



O



O



Clogged element



O



O



Damaged element



O



O



Weakened bypass valve spring



O



Weakened regulator valve spring Interference between oil pump gear and oil pump case and/or cover



O O



O O



Weakened relief valve spring



O



Incorrect installation Oil filter



O



O



Malfunctioning oil pump Oil pump



O



Clogged element



O



O



O



O



Defective gasket



O



Incorrectly mounted and/or clogged oil strainer Defective crankshaft front oil seal



O



Defective crankshaft rear oil seal



O



Incorrectly mounted timing gear case



O



Defective piston cooling oil jet(s)



O



O



Oil working its way up into combustion chamber(s) through piston rings



O



Oil working its way down into combustion chamber(s) through valves



O



Oil viscosity too high



Gr11



O



Poor oil quality



O



Deterioration of oil



O



Excess of oil Fuel mixed with oil



Reference Gr



O O



12-11



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Oil Filter Replacement WARNING • Wipe up any spilled engine oil, as it can cause fires. • To avoid any risk of burns, take care not to touch the engine oil when the engine is hot.



CAUTION • Always use specified engine oil. Use of unspecified engine oil can cause the diesel particulate filter to be clogged prematurely. • Make sure not to put any engine oil on the belt when working on the oil filter. Belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system.



Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened Drain plug (oil filter)



Tightening torque



Remarks



11.8 ± 1.9 {1.2 ± 0.2}



–



Lubricant and/or sealant Mark



Points of application



–



Oil filter



–



Oil filter gasket



Specified lubricant and/or sealant



Quantity



Engine oil (API classification CJ-4, JASO classification DH-2 or ACEA classification E6 SAE 40, 15W-40, 10W-30)



Approx.1 dm3 {1L} As required



Special tools Mark



Tool name and shape



Oil filter wrench



Part No.



MH061590



Application



Removal of oil filter



[Removal] • Remove the drain plug and drain the oil out of the oil filter.



12-12



12 [Installation] • Clean the oil filter mounting surfaces of the oil cooler. • Apply a thin coat of engine oil on the oil filter gasket. • Screw in the oil filter by hand until the gasket touches the oil cooler. Then, tighten the filter by turning it further by five eighths (5/8) of a turn. • After installing the oil filter, start the engine and check that there are no oil leaks. • Remove and reinstall the oil filter if it is leaky. • Pour a specified amount of engine oil. • Run the engine for 1 minute or more to fill the oil filter with the engine oil. • Stop the engine and check the engine oil level. (See later section.)



12-13



ON-VEHICLE INSPECTION AND ADJUSTMENT 2. Engine Oil Replacement WARNING • Wipe up any spilled engine oil, as it can cause fires. • To avoid any risk of burns, take care not to touch the engine oil when the engine is hot.



CAUTION • Always use specified engine oil. Use of unspecified engine oil can cause the diesel particulate filter to be clogged prematurely. • Make sure not to put any engine oil on the belt during engine oil replacement. Belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



–



Drain plug (oil filter)



11.8 ± 1.9 {1.2 ± 0.2}



–



–



Drain plug (oil pan)



39 {4.0}



–



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Approx. 1 dm3 Engine oil {1 L} (API classification CJ-4, JASO classification DH-2 or ACEA classification E6 Approx. 6.5 dm3 SAE 40, 15W-40, 10W-30) {6.5 L}



Oil filter – Oil pan



[Draining] • Before draining the engine oil, warm up the engine until the water temperature gauge begins to move. • Remove the filler cap. • Remove the drain plugs of the oil filter and oil pan to drain out the engine oil. [Refilling] • Tighten the drain plugs to the specified torque, then pour a specified amount of new engine oil into the engine. • Run the engine for 1 minute or more to fill the oil filter with the engine oil. • Stop the engine and check the engine oil level.



CAUTION • If the specified quantity is exceeded as a result of addition of oil, increased oil consumption and/or deteriorated crankcase emission control system function may result.



12-14



12 3. Oil Pressure Measurement Service standards Location



–



Maintenance item Oil pressure (oil temperature at 70 to 90°C)



Standard value



Limit



Remedy



No-load minimum speed



145 kPa {1.5 kgf/cm2}



49 kPa {0.5 kgf/ cm2}



Inspect



No-load maximum speed



295 to 490 kPa {3 to 5 kgf/cm2}



195 kPa {2 kgf/cm2}



Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened



Tightening torque



Engine oil pressure switch



12 {1.2}



Remarks • Sealant • With cold engine



Lubricant and/or sealant Mark –



Points of application Engine oil pressure switch threads



Specified lubricant and/or sealant



Quantity



ThreeBond 1211



As required



• Remove the engine oil pressure switch.



• Using an adapter, connect an oil pressure gauge to the engine oil pressure switch mounting hole. • Warm up the engine until the oil temperature reaches 70 to 90 °C. • Measure the oil pressure while running the engine at a minimum speed and then at maximum speed, both under no load. • If the measurements are below the specified limits, overhaul the lubrication system. • After taking the measurements, apply sealant to the threads of the oil pressure switch and tighten the switch to the specified torque.



CAUTION • Reinstall the oil pressure switch only when the engine is cold.



12-15



ON-VEHICLE INSPECTION AND ADJUSTMENT 4. Engine Oil Level Inspection • Perform the inspection on a flat surface. • Warm up the engine until the water temperature gauge points to the median. • Check the oil level 30 minutes after the engine was stopped. If the oil level is checked about 10 minutes after engine stop, if appears 2 to 5 mm lower than the actual level. • If the oil level is beyond the O hole, it is an indication that a portion of fuel injected during diesel particulate filter regeneration was mixed into the engine oil to raise the oil level. In such a case, replace the engine oil.



CAUTION • If the engine oil is over the O hole of the level gauge, it has been deteriorated and can cause an engine trouble. A sudden rise in engine speed can occur in other case. • If the oil level is lower than it should be, supply additional oil up to the replenishment limit. • If the measured oil level is within normal range but daily check finds oil decrease excessive, check for possible abnormalities below. • Piston ring is stuck to piston. • Excessive clearance between the piston and the crankcase cylinder



12-16



12 M E M O



12-17



OIL PAN, OIL STRAINER AND OIL JET Disassembly sequence 1 2 3 4 5 6



Drain plug Oil pan Oil strainer O-ring Check valve Oil jet



*a: *b: *c:



Timing gear case Lower crankcase Front plate : Locating pin : Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Drain plug



Tightening torque



Remarks



39 {4.0}



–



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



ThreeBond 1217H



As required



Engine oil



As required



Lower crankcase mounting surface of oil pan Timing gear case, lower crank case and front plate mounting surfaces of oil pan O-ring



12-18



12 Installation procedure Installation: Oil pan • Clean the sealant application surfaces of each part. • Apply a bead of sealant to each of the mating surfaces of the timing gear case, lower crankcase and front plate (at the two locations indicated in the illustration).



• Clean the mating surfaces of each part. • Apply a bead of sealant to the mating surface of the oil pan evenly and without any breaks. • Mount the oil pan within three minutes of applying the sealant. Make sure that the sealant stays in place.



CAUTION • Do not start the engine less than an hour after installation. • If the oil pan mounting bolts were loosened or removed, be sure to reapply sealant.



12-19



OIL PUMP Disassembly sequence 1 2 3 4 5 6 7



Oil pump cover Driven gear Plug Relief valve spring Steel ball Gear and case O-ring



a: *b: *



Drive gear Oil pump gear : Locating pin : Non-reusable parts



Assembly sequence Follow the disassembly procedure in reverse.



Service standards (Unit: mm) Location



Maintenance item



Standard value



Limit



Remedy



1, 2



Oil pump cover-to-driven gear shaft clearance



0.03 to 0.05



0.15



Replace



1, 6



Oil pump cover-to-gear and case shaft clearance



0.03 to 0.05



0.15



Replace



2, 6



Gear and case-to-driven gear shaft clearance



0.03 to 0.05



0.15



Replace



Sinkage of each gear from gear and case end surface



0.05 to 0.10



0.15



Replace



Gear and case-to-tooth tip clearance for each gear



0.15 to 0.26



0.27



Replace



Load of installed relief valve spring (installed length: 30.9)



70 ± 8.8 N {7.1 ± 0.9 kgf}



–



Replace



*



2, 6, a 4



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (oil pump mounting)



Tightening torque



Remarks



23.8 {2.4}



–



Screw (oil pump cover mounting)



7.8 to 11.8 {0.8 to 1.2}



–



Plug (relief valve spring mounting)



39.2 to 49.0 {4.0 to 5.0}



–



Lubricant and/or sealant Mark



Points of application Oil pump contact surfaces O-ring



12-20



Specified lubricant and/or sealant



Quantity



Engine oil



As required



12 Inspection procedure Inspection: Driven gear, drive gear and gear and case • Carry out the following inspection. Replace the oil pump if any defects are found. (1) Sinkage of each gear from gear and case end surface



(2) Gear and case-to-tooth tip clearance for each gear



Inspection: Oil pump cover, driven gear, and gear and case • Measure the clearance between each gear’s shaft and the oil pump cover, as well as between each gear’s shaft and the gear and case. • If the measurements are not within the standard value range, replace the defective part(s).



12-21



OIL COOLER AND OIL FILTER



Removal sequence 1 2 3 4 5 6 7 8 9



Drain plug Oil filter Plug Regulator valve spring Regulator valve Plug Bypass valve spring Bypass valve Oil cooler element



10 11 12 13 14 15



Gasket Water drain plug Oil cooler body O-ring Gasket Water separate lip : Non-reusable parts



WARNING • Wipe up any spilled engine oil, as it can cause fires. • To avoid any risk of burns, take care not to touch the engine oil when the engine is hot.



CAUTION • Make sure not to put any engine oil on the belt when working on the oil cooler and oil filter. Belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system.



12-22



12 Installation sequence Follow the removal sequence in reverse. • Do not reuse the oil filter elements by washing.



Service standards (Unit: mm) Location



Maintenance item



Standard value



Limit



Remedy



4



Load of installed regulator valve spring (installed length: 39.8)



66 ± 5.9 N {6.7 ± 0.6 kgf}



–



Replace



7



Load of bypass valve spring (installed length: 42)



40 ± 5.9 N {4.1 ± 0.6 kgf}



–



Replace



9



Air leakage from oil cooler element (air pressure: 1.47 MPa {15 kgf/cm2} for 15 seconds)



0 cm3 {0 mL}



–



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Drain plug Plug (regulator valve spring mounting) Plug (bypass valve spring mounting) Nut (oil cooler element mounting)



Tightening torque



Remarks



11.8 ± 1.9 {1.2 ± 0.2}



–



44.1 ± 4.8 {4.5 ± 0.5}



–



19.6 ± 4.8 {2.0 ± 0.5}



–



29 {3}



–



Water drain plug



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Oil filter gasket O-ring



Special tools Mark



Tool name and shape



Oil filter wrench



Part No.



MH061590



Application



Removal of oil filter



Removal procedure Removal: Oil filter



12-23



OIL COOLER AND OIL FILTER Inspection procedure Inspection: Oil cooler element • Plug the outlet of the oil cooler element and connect a hose to the engine oil inlet port. Then, immerse the oil cooler element in a tank of water. • Apply an air pressure of 1.47 MPa {15 kgf/cm2} for 15 seconds through the hose, and check for any air leaks. • Replace the element if it leaks air.



Installation procedure Installation: Oil cooler • Clean the oil filter mounting surface of the oil cooler. • Apply a thin coat of engine oil on the oil filter gasket. • Screw in the oil filter by hand until the gasket touches the oil cooler. Then, tighten the filter by turning further by five eighths (5/8) of a turn. • After installing the oil filter, start the engine and check that there are no oil leaks. • Remove and reinstall the oil filter if it is leaky. • Stop the engine and check the engine oil level. • Add engine oil if necessary.



12-24



GROUP 13 FUEL AND ENGINE CONTROL SPECIFICATIONS.................................. 13-2



FUEL FILTER ....................................... 13-74



STRUCTURE AND OPERATION 1. Common Rail System ...................... 13-4 2. Engine Electronic Control Unit ...... 13-14 3. Accel Control ................................. 13-22 4. Fuel Filter .......................................... 13-23



ACCELERATOR PEDAL...................... 13-78



TROUBLESHOOTING ................................ 13-24



1. Diagnosis Procedure ..................... 13-26 2. Diagnostic Precautions ................. 13-26



INSPECTION OF ELECTRICAL EQUIPMENT......................................... 13-82 INSTALLED LOCATIONS OF PARTS .................................................. 13-88 ELECTRIC CIRCUIT DIAGRAM ........ 13-100



3. Inspections Based on Diagnosis Codes ............................................ 13-27 4. Multi-Use Tester Service Data ........ 13-52 5. Actuator Tests Performed Using Multi-Use Tester ............................. 13-55 6. Inspections Performed at Electronic Control Unit Connectors ................ 13-56



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspecting and Adjusting No-load Minimum and Maximum Speeds .... 13-60 2. Air-bleeding of Fuel System........... 13-61 3. Fuel Filter Replacement ................. 13-62 4. Registration of Vehicle Identification Number (VIN) ................................ 13-63



SUPPLY PUMP .................................... 13-64 COMMON RAIL.................................... 13-68 INJECTOR............................................ 13-70 FUEL TANK.......................................... 13-72



13-1



SPECIFICATIONS Item



Specifications



Manufacturer



Bosch



Supply pump type



CP3.3 NH



Control system Supply pump



Electronically-controlled pump



Model



Radial, 3-cylinder



Feed pump type



External gear type



MPROP (rail pressure control valve)



Model



MPROP



Rated voltage



V



Max. common rail pressure MPa {kgf/cm2} Manufacturer Common rail capacity Common rail



cm



Common rail pressure sensor supply voltage



V



Manufacturer



Min. operating pressure Engine electronic control unit



13-2



210 to 220 {2141 to 2243} 5



Electrical MPa {kgf/cm2}



180 {1840}



MPa {kgf/cm2}



25 {255}



Manufacturer Rated voltage



18.7 {18.7}



Bosch



Control system Injectors



180 {1840} Bosch



3 {ml}



Pressure limiting valve opening pressure MPa {kgf/cm2}



Max. operating pressure



24



Bosch V



24



13 M E M O



13-3



STRUCTURE AND OPERATION 1. Common Rail System 1.1 Overview • In the common rail system, an electronic control unit monitors various aspects of the engine (engine speed, throttle opening, coolant temperature, etc.) using information from sensors. In accordance with these data, the electronic control unit effects control over the fuel injection quantity, fuel injection timing, and fuel injection pressure in order to optimize the engine’s operation. • The electronic control unit has a diagnosis function that enables it to recognize abnormalities in the common rail system’s major components and alert the driver to them. • The common rail system consists mainly of an electronically controlled supply pump; injectors; a common rail; and the electronic control unit and sensors that are used to control the other components.



13-4



13



13-5



STRUCTURE AND OPERATION • When the engine is cranked by means of the starter switch, the feed pump (this is located inside the supply pump) simultaneously draws fuel from the fuel tank and feeds it via the fuel filter to the MPROP (rail pressure control valve). A quantity of fuel metered by the MPROP is supplied via the inlet valves to the plunger chambers. • The fuel in the plunger chambers is pressurized. The outlet valves are then opened, and the fuel is fed under pressure to the common rail. • The pressurized fuel is held in the common rail and then uniformly fed to the injectors. • In response to signals from the engine electronic control unit, the injectors inject fuel into the relevant combustion chamber at the optimal timing and in the optimal quantity.



13-6



13 1.2 Supply pump



13-7



STRUCTURE AND OPERATION



• The supply pump pressurizes fuel and supplies it in a highly pressurized state. • Fuel drawn from the fuel tank by the feed pump is not supplied directly to the plungers. It is supplied first to the MPROP (rail pressure control valve), which controls the amount of fuel reaching the plungers. • If the fuel pressure exceeds a certain level, the overflow valve returns fuel to the inlet side of the feed pump. This operation keeps the pressure of the fuel fed to MPROP, constant. • Rotation of the eccentric drive shaft causes (via the tappets) up-down movement of the plungers. Fuel in the plunger chambers is thus highly pressurized.



13-8



13 (1) MPROP (rail pressure control valve)



CAUTION • Be sure to connect the MPROP (rail pressure control valve) connector to the engine harness before starting the engine. If the engine were started with the MPROP connector not connected, control of the supply pump by the engine electronic control unit would not be possible and a fault would ensue. • The MPROP receives fuel from the feed pump and feeds fuel toward the plungers of the supply pump in such a quantity that the fuel pressure (target common rail pressure) corresponds to that required by the engine electronic control unit. • When the MPROP is not operating, i.e., when current is not flowing, fuel flows at its maximum rate. When current flows, the piston in the MPROP is pressed down such that fuel is not fed toward the plungers. • The engine electronic control unit controls the ratio of current-off time (duty ratio). (2) Zero delivery throttle • A small amount of fuel can flow through the MPROP (rail pressure control valve) to the plunger even when the MPROP reduces fuel flow to the fullest extent. To stop the fuel feed to the plunger, the zero delivery throttle is opened to return fuel to the feed pump, causing the fuel flow for the plunger to reach zero.



(3) Overflow valve • The overflow valve opens when the pressure of the fuel sent from the feed pump exceeds the predetermined level to return the excess fuel to the inlet side of the feed pump. The fuel which has overflowed enters into the eccentric drive shaft chamber to lubricate the parts in the chamber.



13-9



STRUCTURE AND OPERATION (4) Flow control valve • The flow control valve diverts the excess of fuel sent from the feed pump into the eccentric drive shaft chamber for the part lubrication.



1.3 Common rail



• The common rail distributes to the injectors high-pressure fuel that has been fed from the supply pump. • Each flow limiter prevents an abnormal outflow of fuel. It does so by blocking the fuel passage in the event of fuel leakage from the injection pipe or excessive injection of fuel from the injector. • The common rail pressure sensor is used in feedback control. It senses the fuel pressure (actual common rail pressure) inside the common rail and feeds a corresponding signal to the engine electronic control unit. • If the fuel pressure in the common rail exceeds a certain, set level, the valve piston in the pressure limiting valve pushes and compresses the spring such that fuel is able to escape. The pressure limiting valve thus prevents the fuel pressure from becoming higher than the set pressure. Flow limiter • During normal operation, the piston moves (thus pushing and compressing the spring) to the extent necessary for one injection quantity to pass through. The piston does not make contact with the seat at this time. When injection is complete, the piston is returned to its initial position by the spring. • If the amount of fuel passing through the flow limiter becomes excessively great, the piston presses against the seat, thereby closing the fuel passage and preventing an abnormal outflow of fuel. When the piston has pressed against the seat, it does not return to its original position until the engine has been stopped and the pressure in the common rail has come down.



13-10



13 1.4 Injector



• In accordance with electrical signals from the engine electronic control unit, each injector supplies high-pressure fuel from the common rail to the relevant combustion chamber of the engine at the optimal timing and in the optimal quantity. • The injector is divided into the control section and the injector section. • The control section consists of the control chamber, magnet, valve spring, armature plate, valve ball, valve body, valve piston, orifice A, and orifice Z. The valve piston is located between the control section and the injection section. • The injection section consists of the nozzle body, nozzle needle, nozzle spring, and nozzle nut.



13-11



STRUCTURE AND OPERATION (1) Operation (1.1) Injection not taking place • With the magnet not energized, the armature plate is pushed up by the valve spring such that the ball seat is closed. • The high-pressure fuel acts upon the control chamber via orifice Z. The same pressure acts upon the nozzle needle. • The fuel pressure acting on the nozzle needle cannot overcome the valve piston and nozzle spring, so the nozzle needle stays in its downward-pushed position and injection does not take place.



(1.2) Start of injection • When the magnet is energized, the resulting electromagnetic force draws the armature plate upward, causing the ball seat to open. • Fuel in the control chamber passes through the ball seat and orifice A and flows to the fuel tank. • With the pressure in the control chamber reduced, the fuel acting on the nozzle needle overcomes the valve piston and nozzle spring, pushing up the nozzle needle such that injection starts. • If the magnet remains energized, the injection reaches its maximum level.



13-12



13 (1.3) End of injection • When energization of the magnet is stopped, the armature plate is pushed downward by the valve spring such that the ball seat closes. At this time, fuel flows into the control chamber via orifice Z, pushing down the valve piston and nozzle needle such that injection finishes.



13-13



STRUCTURE AND OPERATION 2. Engine Electronic Control Unit • According to output information signals from the sensors and switches of the controllers to ensure normal operation of the common rail system, regeneration control type diesel particulate filter system and exhaust gas recirculation system, the engine and vehicle, characteristic and correction data stored in the ROM (a kind of memory) are read into the CPU (central processor unit) and arithmetically processed to thereby control the various systems.



2.1 System block diagram



13-14



13 Part



Main function/operation



Engine speed sensor



Sensing of engine speed



Cylinder recognition sensor



Cylinder recognition



Water temperature sensor



Sensing of coolant temperature



Boost pressure sensor



Sensing of boost pressure



Common rail pressure sensor



Sensing of common rail pressure



Fuel temperature sensor



Sensing of fuel temperature



Intake air temperature sensor 1



Sensing of intake air temperature



Intake air temperature sensor 2



Sensing of boost air temperature



Starter switch



Senses that the engine is in starting condition with the starter switch in START position.



Accelerator pedal position sensor



Sensing of extent of accelerator pedal depression



Accelerator pedal switch (incorporated into accelerator pedal position sensor)



Sensing of released/pressed condition of accelerator pedal (ON with pedal released)



Pulse divider (vehicle speed sensor)



Sensing of vehicle speed



Idling speed adjustment potentiometer



Acceleration of warm-up



Fuel injection rate adjustment resistor



Correction of fuel injection rate



DPF absolute pressure sensor



Sensing of DPF absolute pressure



DPF differential pressure sensor



Sensing of DPF filter differential pressure



Diagnosis switch



Output of diagnosis codes



Memory clear switch



Deletion of diagnosis codes; output of past diagnosis codes



Air conditioner switch



ON when air conditioner is operating



Exhaust brake switch



Exhaust brake ON/OFF control



DPF cleaning switch



ON/OFF changeover of DPF parked regeneration



Parking signal relay (parking brake switch)



Detection of parking condition (turns ON when the parking brake is applied)



Exhaust gas temperature sensor 1



Detection of ceramic filter inlet temperature



Exhaust gas temperature sensor 2



Detection of ceramic filter outlet temperature



Catalytic temperature sensor



Detection of front oxidation catalytic inlet temperature



Air flow sensor



Sensing of intake air flow rate



Power take-off load sensor



Sensing of extent of accelerator pedal depression



Power take-off resistor



Selection of power take-off map



Power take-off switch



Operation of power take-off



Injector



Control of fuel injection quantity, fuel injection timing, and fuel injection pressure



MPROP (rail pressure control valve)



Control of fuel injection pressure



Engine warning lamp



Indication of system abnormalities



DPF indicator lamp



Illuminates when the particulate matter accumulates in the DPF ceramic filter



Exhaust shutter indicator lamp



ON when auxiliary brake is operating



Glow indicator lamp



ON when preheating system is started



Tachometer



Indication of engine speed (in meter cluster)



Glow drive relay



ON/OFF control of glow plugs



Exhaust shutter 3-way magnetic valve 1, 2



ON/OFF control of exhaust shutter valve



Safety relay



Control of starter continuous energization prevention function



EDU relay



Switching ON/OFF supply of power to exhaust gas recirculation electronic drive unit, throttle and turbocharger electronic drive unit



INOMAT-II ECU



Idle-up cancel signal



Releasing the idle-up except N range



Transmission neutral signal



Sensing of Transmission neutral (N range)



Clutch released/pressed signal



Sensing of clutch released/pressed



Engine speed signal



Output of engine speed for INOMAT-II control



Accelerator pedal position signal



Output of extent of accelerator pedal for INOMAT-II control



13-15



STRUCTURE AND OPERATION Part



Main function/operation



Engine data recognized by the engine electronic control unit are outputted to the CAN bus to enable systems to obtain data that they need for CAN communication (EGR EDU, Throttle EDU, Turbocontrol. Each electronic drive unit issues signals to the engine electroncharger EDU) ic control unit via the CAN bus to enable it to effect engine control appropriate for each type of system control.



CAN communication (INOMAT-II ECU, ISS ECU)



Engine data recognized by the engine ECU are outputted to the CAN bus to enable systems to obtain data that they need for control. The INOMAT-II ECU and ISS ECU issue signals to the engine ECU to enable it to effect engine control appropriate to control of the system. (See Gr22E for INOMAT-II ECU.) (See Gr54 for ISS ECU.)



CAN communication (Multi-Use Tester)



Allowing the service personnel to read or erase diagnosis codes and obtain the electronic control unit and vehicle data using a scan tool.



ABS: Anti-lock brake system CAN: Controller area network DPF: Diesel particulate filter ECU: Electronic control unit EDU: Electronic drive unit ISS: Idling stop and start system INOMAT-II: Intelligent and innovative mechanical automatic transmission-II



13-16



13 2.2 Fuel injection control (1) Pilot injection • Pilot injection entails the injection of an extremely small amount of fuel ahead of the main injection. • Pilot injection suppresses heat generation early in the injection cycle and thus suppresses NOx generation and noise at the start of combustion.



(2) Split injection control • Split injection entails the injection of an extremely small amount of fuel two or more times ahead of the main injection. • This improves the ignitability of fuel and realizes better startability at cold engine and reduction of HC at low-load operation.



(3) Post injection • Fuel injection control for diesel particular filter regeneration is performed in such a way, with early post injection and late post injection added after conventional fuel injection (main injection), exhaust gas temperature is increased to burn out particulate matter (PM) collected in the DPF.



2.3 Fuel injection quantity control (1) Fuel injection quantity during engine startup • During engine startup, the fuel injection quantity is determined in accordance with the engine speed and coolant temperature.



(2) Basic fuel injection quantity • The basic fuel injection quantity is determined in accordance with the engine speed and throttle opening.



13-17



STRUCTURE AND OPERATION (3) Maximum injection quantity • The maximum injection quantity is calculated from the engine speed and boost pressure.



(4) Fuel injection rate adjustment resistor correction amount • To limit inconsistency in the injection quantity, the injection quantity is corrected by the fuel injection rate adjustment resistor.



2.4 Fuel injection timing control (1) Main injection timing • The main injection timing is calculated from the fuel injection quantity and engine speed.



(2) Pilot injection timing (pilot interval) • The pilot injection timing is calculated from the fuel injection quantity and engine speed.



2.5 Fuel injection pressure control • The fuel injection pressure is calculated from the fuel injection quantity and engine speed.



13-18



13 2.6 Warm-up acceleration function Input signals



Water temperature sensor Accelerator pedal position sensor Idling speed adjustment potentiometer



Engine electronic control unit



Output signals



Comparison operations Idling speed control Target injection quantity



• The warm-up acceleration function accelerates engine warm-up by varying the engine’s idling speed in accordance with the engine’s coolant temperature. It can operate either automatically or manually. Selection is made using the idling speed adjustment potentiometer.



2.7 Auxiliary brake function Input signals



Accelerator pedal position sensor Exhaust brake switch INOMAT-II electronic control unit (Transmission neutral signal, clutch released/ pressed signal.)



Engine electronic control unit



Auxiliary brake function



Output signals



Exhaust shutter 3-way magnetic valve



INOMAT-II: Intelligent and innovative mechanical automatic transmission-II



• The auxiliary brake function activates or deactivates the exhaust shutter 3-way magnetic valve according to the vehicle condition to control the exhaust brake.



2.8 Idle-up function • The idle-up function increases the engine idling speed when a load is applied to the engine by other system (such as air conditioner) or when the warm-up acceleration function are activated. Also, in the case of variable geometry turbocharger-equipped vehicles, idling speed can be increased with the lighting switch turned on as well.



2.9 Vehicle identification number (VIN) written (register) function • The vehicle identification number (VIN) registration function is used to have the VIN of the vehicle registered when a new engine electronic control unit is installed or the existing one is replaced. (For the VIN registration method, see “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



2.10Fault diagnosis function • The sensors and other components are continuously monitored for faults. In the event that a component is found faulty, an indication is made in the meter cluster to alert the driver, the fault location is memorized in the form of a diagnosis code, and the control during fault is initiated. • While the control during fault is taking place, the system’s functionality is limited to ensure vehicle and driver safety. It is possible to read the memorized diagnosis code using a Multi-Use Tester or from flashing of the warning lamp.



13-19



STRUCTURE AND OPERATION 2.11 Electronic Control Unit Connection Diagram



13-20



13



13-21



STRUCTURE AND OPERATION 3. Accel Control • The engine is electronically controlled by the engine electronic control unit (ECU). • By processing accelerator pedal position data from the accelerator position sensor, the engine electronic control unit controls the injectors for optimum fuel injection.



13-22



13 4. Fuel Filter



• The fuel filter, which also serves as a water separator, removes impurities in the fuel through the filter element and also separates water from fuel. • The water that has been separated from the fuel collects at the bottom of the fuel filter. A water separator sensor is installed in the fuel filter, which activates the warning lamp on the meter cluster when the water reaches a certain level. • The water can be drained through the drain hole by loosening the water separator sensor. • A priming pump is provided at the fuel filter head. The priming pump is used for air-bleeding the fuel system. • When the fuel temperature rises, the thermostat swells and the valve of the fuel filter head is closed. The hightemperature fuel entirely returns to the fuel tank through the fuel return pipe. • When the fuel temperature lowers, the thermostat does not swell and the valve to the fuel filter remains open. The high-temperature fuel returning through the fuel return pipe is let through the valve to mix into the fuel around the element. The fuel around the element is warmed as a result and wax in it (precipitated when the fuel temperature is low) is dissolved to prevent clogging of the element.



13-23



Common rail system faulty



Supply pump



O O



O



O



O



*a



Defective sealing supply pump overflow valve



O



O



O



O



*a



Defective MPROP (rail pressure control valve)



O



O



O



O



O *a



Defective supply pump



O



O



O



O



O O



O O



O



Operation of flow limiter



O



Pressure limiting valve malfunction



O



Open or short circuit failure, poor contact of inIncorrect injector fuel jector magnetic valve injection Defective injector, defective injector magnetic valve, defective injection nozzle Clogged fuel filter



O



Clogged fuel pipe and/or leaky pipe joints



O



Air or water in fuel system



O



O



O



O



O *b



O O



O



O



*b



O



O O



O



O O



O O



Fuel leakage from high pressure joint



O O O O



Defective accelerator position sensor



Cracked fuel pipe and/or hose



*a: Contact a Bosch service station for repair. *b: Replace common rail or injector



13-24



O *b O *b



Fuel other than low-sulfur diesel oil used (high-sulfur diesel oil, kerosene, heavy oil, biofuel, etc.) Poorly adjusted accelerator pedal stopper bolt



*a O *b



O O



O



No fuel in fuel tank



Engine control



Reference Gr



Defective feed pump



Malfunction of common rail pressure sensor Common rail



warning lamp illuminates



Fuel supply is insufficient



Engine does not stop



Engine stops soon after starting



Engine is idling unstably



Engine maximum speed is too high



Engine output is insufficient



Engine output is unstable



Engine knocks



Possible causes



Engine is difficult to start



Engine refuses to start



Symptoms



Engine does not reach maximum speed



TROUBLESHOOTING



O



O O



O



O O



O



O O



Oil viscosity unsuitable



O O



O



Defective cylinder head gasket



O



O



Wear of and/or carbon deposits on valve and valve seat



O



O



Distorted valve springs



O



O



Worn or damaged piston rings



O



O



Worn or damaged piston ring groove



O



Worn piston and/or cylinder liner



O



O



Poorly functioning cooling system



O



O



Defective glow plug Open-circuited, short-circuited or poorly connected engine speed sensor and/or cylinder recognition sensor



warning lamp illuminates



Fuel supply is insufficient



Gr11



Gr14 Gr54



O O O



O O O O



O



Open-circuited, short-circuited or poorly connected coolant temperature O O sensor



O O



Poorly connected injection rate adjusting resistor



O



Open-circuited, short-circuited or poorly connected idling adjustment control



O O O



Reference Gr



Gr12



O O



Open-circuited, short-circuited or poorly connected boost pressure sensor



Blown fuse



Engine does not stop



O



Valve clearance incorrect



Defective starter switch



Engine stops soon after starting



Engine is idling unstably



Engine maximum speed is too high



Engine output is insufficient



Engine output is unstable



Engine knocks



Engine is difficult to start



Possible causes



Engine refuses to start



Symptoms



Engine does not reach maximum speed



13



O



O O



O O



O Gr54



13-25



TROUBLESHOOTING 1. Diagnosis Procedure • Perform the inspection in accordance with the following flowchart. Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Clear stored diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition.



13-26



13 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. Multi-Use Tester indication Code



Message



Warning lamp indication Flashes Orange



Remarks



Red



P0002 Fuel system



63



O



–



P0004 Fuel system (High)



63



O



–



P0016 Ne SNSR Offset/Backup Mode



14



O



O



P0045 VGT Actuator (Open)



51



O



–



P0046 VGT Actuator (Performance)



51



O



–



P0047 VGT Actuator (Low)



51



O



–



P0087 CRS (Too Low)



36



O



–



P0088 CRS (Too High)



23



O



O



P0089 MPROP (Over Load)



63



O



–



P0090 MPROP (Open Circuit)



63



O



–



P0091 MPROP (Low)



63



O



–



P0092 MPROP (High)



63



O



–



P0093 CRS (Fuel Leak)



22



O



O



P0097 INT Air Temp Sensor 2 (Low)



9



O



–



P0098 INT Air Temp Sensor 2 (High)



9



O



–



P0102 Airflow Sensor (Low)



17



O



–



P0103 Airflow Sensor (High)



17



O



–



P0112 INT Air Temp SNSR (Low)



44



O



–



P0113 INT Air Temp SNSR (High)



44



O



–



P0117 Water Temp SNSR (Low)



21



O



–



P0118 Water Temp SNSR (High)



21



O



–



P0122 Accel Pedal Sensor 1



24



O



–



P0123 Accel Pedal Sensor 1



24



O



–



P0148 CRS (Fuel Delivery)



22



–



O



P0182 Fuel Temp Sensor (inlet) Low



41



–



–



P0183 Fuel Temp Sensor (inlet) High



41



–



–



P0192 CRS Pressure SNSR (Low)



11



O



–



P0193 CRS Pressure SNSR (High)



11



O



–



P0201 Injector M/V-Cylinder 1 (Load)



37



O



–



P0202 Injector M/V-Cylinder 2 (Load)



38



O



–



P0203 Injector M/V-Cylinder 3 (Load)



39



O



–



P0204 Injector M/V-Cylinder 4 (Load)



8



O



–



P0219 Engine Overrunning



7



–



O



P0222 Accel Pedal Sensor 2



16



O



–



P0223 Accel Pedal Sensor 2



16



O



–



P0226 Throttle Valve Position



28



O



–



P0234 Over Boost



54



O



–



P0237 Boost Press SNSR (Low)



32



O



–



P0238 Boost Press SNSR (High)



32



O



–



P0251 Common Rail Pressure Defect



36



O



–



P0253 Common Rail Pressure Defect



22



–



O



P0254 Common Rail Pressure Defect



23



–



O



P0335 Engine Revolution SNSR



15



O



–



P0339 Engine Revolution SNSR (Plausi)



15



O



O



P0340 Camshaft Position SNSR



12



O



–



Gr15



Gr17



Gr17 Gr15



13-27



TROUBLESHOOTING Multi-Use Tester indication Code



Message



Warning lamp indication Flashes Orange



Red



P0344 Camshaft Position SNSR (Plausi)



12



O



–



P0380 Relay for Glow Relay



26



–



–



P0381 Glow Lamp



89



–



–



P0383 Relay for Glow Relay



26



–



–



P0384 Relay for Glow Relay



26



–



–



P0403 EGR1 (Actuator Circuit)



2



O



–



P0404 EGR System



67



O



–



P0409 EGR1 (Position Sensor)



67



O



–



P0472 DPF Press SNSR (LOW)



98



O



–



P0473 DPF Press SNSR (HIGH)



98



O



–



P0489 EGR Power Supply



67



O



–



P0490 EGR Power Supply



67



O



–



P0500 Vehicle Speed Sensor



25



O



–



P0506 Idle Volume



52



O



–



P0507 Idle Volume



52



O



–



P0510 Accel SW



65



–



–



P0545 DPF Temp SNSR (upstream) Low



87



O



–



P0546 DPF Temp SNSR (upstream) High



87



O



–



P0562 Power Supply Voltage (Low)



33



O



–



P0563 Power Supply Voltage (High)



33



O



–



P0605 ECU System (Hardware)



33



O



–



P0607 ECU System



33



O



O



P060B A/D Converter



33



O



–



P0615 Starter Safety Relay (Over Load)



48



–



O



P0616 Starter Safety Relay (Low)



48



–



O



P0617 Starter Safety Relay (High)



48



–



O



P061B ECU Performance (Calc)



33



O



–



P061C ECU Performance (Ne)



33



O



–



P062D Injector Bank 1



82



O



–



P062E Injector Bank 2



82



O



–



P0642 Sensor Supply Voltage 1 (Low)



81



O



–



P0643 Sensor Supply Voltage 1 (High)



81



O



–



P0652 Sensor Supply Voltage 2 (Low)



81



O



–



P0653 Sensor Supply Voltage 2 (High)



81



O



–



P0657 M/V Voltage (Low)



79



O



–



P0685 EDU Relay (Open)



84



O



–



P0686 EDU Relay (Low)



84



O



–



P0687 EDU Relay (High)



84



O



–



P0688 EDU Relay (Over Load)



84



O



–



P0698 Sensor Supply Voltage 3 (Low)



81



O



–



P0699 Sensor Supply Voltage 3 (High)



81



O



–



P1171 Q Adjustment Resistor (Low)



34



O



–



P1172 Q Adjustment Resistor (High)



34



O



–



13-28



Remarks



Gr54



Gr17



Gr15 Gr17



Gr15



Gr54



Gr15, 17



13 Multi-Use Tester indication Code



Message



Warning lamp indication Flashes Orange



Remarks



Red



P1410 Exhaust Absolute Pressure (High)



92



O



–



P1411 Excessive exhaust Temperature



88



–



O



P1412 DPF Temp Abnormal 1 (Auto) (Low)



92



–



–



P1413 DPF Temp Abnormal 2 (Auto) (Low)



92



–



–



P1414 DPF Temp Abnormal 3 (Auto) (High)



92



–



–



P1415 DPF Interval Abnormal (Auto)



92



–



–



P1416



DPF Temp Abnormal 1 (Manual) (Low)



92



O



–



P1417



DPF Temp Abnormal 2 (Manual) (Low)



92



O



–



P1418



DPF Temp Abnormal 3 (Manual) (High)



92



O



–



P1419 DPF Interval Abnormal (Manual)



92



O



–



P1421 PM accumulation amount level 1



92



O



–



P1422 PM accumulation amount level 2



92



O



–



P1430 DPF Regeneration switch



78



O



–



P1435 Exhaust Relative Pressure (Low)



92



O



–



P1440 DPF Temp Abnormal 4 (Auto)



92



–



–



P1441 DPF Temp Abnormal 4 (Manual)



92



–



–



P1447 Catalyst Temp Sensor (Low)



13



O



–



P1448 Catalyst Temp Sensor (High)



13



O



–



P1466 Auxiliary Brake M/V 2 (Plausi)



94



O



–



P1467 Auxiliary Brake M/V 2 (Low)



94



O



–



P1468 Auxiliary Brake M/V 2 (High)



94



O



–



P1577 Segment Sensor Supply Voltage



81



–



–



P1578 Segment Sensor Supply Voltage



81



–



–



P1632 CAN (EGR Time out)



95



O



–



P1635 CAN (Intake Throttle)



96



O



–



P1645 CAN Communication (VGT)



76



O



–



P1660 DPF Lamp Control Circuit (Low)



29



O



–



P2032 Exhaust Gas Temp (Low)



88



O



–



P2033 Exhaust Gas Temp (High)



88



O



–



P2100 TVA (Open)



28



O



–



P2101 TVA (System)



28



O



–



P2102 TVA (Short)



28



O



–



P2108 TVA (Controller)



28



O



–



P2135 TVA SNSR (Voltage)



28



O



–



P2146 Injector Bank 1 (Plausibility)



82



O



–



P2147 Injector Bank 1 (Low)



82



O



–



P2148 Injector Bank 1 (High)



82



O



–



P2149 Injector Bank 2 (Plausibility)



82



O



–



P2150 Injector Bank 2 (Low)



82



O



–



P2151 Injector Bank 2 (High)



82



O



–



P2169 Exhaust Valve Act (Open)



93



O



–



P2170 Exhaust Valve Act (Gnd)



93



O



–



P2171 Exhaust Valve Act (Batt)



93



O



–



P2228 Atm Press SNSR (Low)



19



O



–



P2229 Atm Press SNSR (High)



19



O



–



P2263 VGT System



51



O



–



Gr15



Gr15



Gr17



Gr15



Gr17



Gr15



13-29



TROUBLESHOOTING Multi-Use Tester indication Code



Message



Warning lamp indication Flashes Orange



Red



P2413 EGR System



67



O



–



P2453 DPF Diff SNSR (Plausi) & MFF



97



O



–



P2454 DPF Diff SNSR (Low) & MFF



97



O



–



P2455 DPF Diff SNSR (High) & MFF



97



O



–



P253C PTO Acc (Low)



61



O



–



P253D PTO Acc (High)



61



O



–



P254C PTO Ne (Low)



62



–



–



P254D PTO Ne (High)



62



–



–



P2562 VGT Position Sensor



51



O



–



P2670 MPROP Voltage (Low)



36



O



–



U0001 CAN No Data Received



95



O



–



U0073 CAN Communication Bus Off



95



O



–



13-30



Remarks Gr17 Gr15



Gr15



13 3.2 Diagnosis code generation conditions and inspection items P0002: Fuel system (warning lamp flashes: 63) Generation condition



Internal trouble of engine electronic control unit (malfunction of MPROP (rail pressure control valve control circuit is detected)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P0004: Fuel system (High) (warning lamp flashes: 63) Generation condition



Internal trouble of engine electronic control unit (malfunction of MPROP (rail pressure control valve drive circuit is detected)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P0016: Ne SNSR Offset/Backup Mode (warning lamp flashes: 14)



Generation condition



Either of the following occurs. (1) Slippage of the camshaft and crankshaft in angle recognition is detected. (Diagnosis switch flashes warning lamp (red): 12 times) (2) Despite input of starter switch signal (S signal), output signals from engine speed sensor and cylinder detection sensor remain off for 7.2 seconds. (Diagnosis switch flashes warning lamp (red): 14 times) (3) When backup mode is established (controlled by cylinder recognition sensor) due to malfunction of the engine speed sensor unit. (Diagnosis switch flashes warning lamp (red): 15 times)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



[In the case of above problem (1)] • Effects no special control. [In the case of above problem (2)] • Normal control (engine restart not enabled) [In the case of above problem (3)] • Control is carried out using cylinder recognition sensors.



Service data Inspection



01: Engine Revolution, 71: Starter SW (S)



Electronic control unit connector



05



: Engine speed sensor,



06



: Cylinder recognition sensor



Electrical equipment



#263: Engine speed sensor, #320: Cylinder recognition sensor



Electric circuit diagram



Engine speed sensor, cylinder recognition sensor and starter switch (S) system



P0087: CRS (Too Low) (warning lamp flashes: 36) Generation condition



Actual common rail pressure is lower than target common rail pressure (the difference is 16.7 % or more) or remains in that state for more for 60 seconds (actual common rail pressure is still below target level).



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Inspection



Injection quantity is limited. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped.



Service data



03: Reference Common Rail Pressure, 04: Actual Common Rail Pressure, 05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Electrical equipment



#582: Injector



Other



• • • • •



Check the fuel pipe Fuel filter Supply pump (Have work performed by Bosch service station.) Pressure limiting valve (Have work performed by Bosch service station.) Injector (Have work performed by Bosch service station.)



13-31



TROUBLESHOOTING P0088: CRS (Too High) (warning lamp flashes: 23)



Generation condition



Either of the following occurs. (1) Although the discharge rate of MPROP (rail pressure control valve) is lower than the specified limit, actual common rail pressure remains higher than the target common rail pressure (the difference is 16.7 % or more) for 10 seconds (a state in which little fuel is delivered from MPROP (rail pressure control valve) but common rail internal pressure exceeds target common rail pressure) (2) Actual common rail pressure remains over 105.6 % for 5 seconds (actual common rail pressure is excessive).



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Inspection



Injection quantity is limited. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped.



Service data



03: Reference Common Rail Pressure, 04: Actual Common Rail Pressure, 05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Electrical equipment



#582: Injector



Other



• MPROP (rail pressure control valve) (Have work performed by Bosch service station.) • Supply pump (Have work performed by Bosch service station.) • Injector (Have work performed by Bosch service station.)



P0089: MPROP (Over Load) (warning lamp flashes: 63) Generation condition



Current flowing in MPROP (rail pressure control valve) circuit remains in excess of the specified limit for 0.3 second.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • •



Electronic control unit connector Inspection



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped. 11



: MPROP (rail pressure control valve)



Electrical equipment



#574: MPROP (rail pressure control valve)



Electric circuit diagram



MPROP (rail pressure control valve) system



Other



MPROP (rail pressure control valve) (Have work performed by Bosch service station.)



P0090: MPROP (Open Circuit) (warning lamp flashes: 63) Generation condition



MPROP (rail pressure control valve) circuit open-circuited for 0.3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Electronic control unit connector Inspection



13-32



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. 11



: MPROP (rail pressure control valve)



Electrical equipment



#574: MPROP (rail pressure control valve)



Electric circuit diagram



MPROP (rail pressure control valve) system



Other



MPROP (rail pressure control valve) (Have work performed by Bosch service station.)



13 P0091: MPROP (Low) (warning lamp flashes: 63) Generation condition



MPROP (rail pressure control valve) circuit shorted to ground for 0.3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Electronic control unit connector Inspection



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. 11



: MPROP (rail pressure control valve)



Electrical equipment



#574: MPROP (rail pressure control valve)



Electric circuit diagram



MPROP (rail pressure control valve) system



Other



MPROP (rail pressure control valve) (Have work performed by Bosch service station.)



P0092: MPROP (High) (warning lamp flashes: 63) Generation condition



MPROP (rail pressure control valve) circuit shorted to power supply for 0.3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Electronic control unit connector Inspection



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. 11



: MPROP (rail pressure control valve)



Electrical equipment



#574: MPROP (rail pressure control valve)



Electric circuit diagram



MPROP (rail pressure control valve) system



Other



MPROP (rail pressure control valve) (Have work performed by Bosch service station.)



P0093: CRS (Fuel Leak) (warning lamp flashes: 22)



Generation condition



After diagnosis code P0087 occurs, the discharge rate of MPROP (rail pressure control valve) is above the specified limit but actual common rail pressure is lower than target common rail pressure (the difference is 16.7 % or more) or remains in that state for more for 60 seconds (a state in which more fuel than specified quantity is delivered from MPROP (rail pressure control valve) but common rail internal pressure is below target common rail pressure).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Engine stops.



Inspection



• • • •



Other



Fuel system piping Fuel filter Supply pump (Have work performed by Bosch service station.) Pressure limiting valve (Have work performed by Bosch service station.)



P0112: INT Air Temp SNSR (Low) (warning lamp flashes: 44) Generation condition



Intake air temperature sensor 1 voltage remains less than 0.15 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Backup value (25°C) is used.



Service data Inspection



Electronic control unit connector



0D: Intake Air Temperature 1, 28: Intake Air Temp SNSR1 Voltage 13



: Intake air temperature sensor 1



Electrical equipment



#305: Intake air temperature sensor



Electric circuit diagram



Intake air temperature sensor 1 system



13-33



TROUBLESHOOTING P0113: INT Air Temp SNSR (High) (warning lamp flashes: 44) Generation condition



Intake air temperature sensor 1 voltage remains higher than 4.87 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Backup value (25°C) is used.



Service data Inspection



0D: Intake Air Temperature 1, 28: Intake Air Temp SNSR1 Voltage



Electronic control unit connector



13



: Intake air temperature sensor 1



Electrical equipment



#305: Intake air temperature sensor



Electric circuit diagram



Intake air temperature sensor 1 system



P0117: Water Temp SNSR (Low) (warning lamp flashes: 21) Generation condition



Water temperature sensor voltage remains less than 0.2 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• • • •



Service data Inspection



Backup value (80°C) is used. DPF regeneration control is stopped. Exhaust gas recirculation control is stopped. Throttle control is stopped.



13: Water Temperature, 25: Water Temp SNSR Voltage



Electronic control unit connector



01



: Water temperature sensor



Electrical equipment



#262: Water temperature sensor



Electric circuit diagram



Water temperature sensor system



P0118: Water Temp SNSR (High) (warning lamp flashes: 21) Generation condition



Water temperature sensor voltage remains higher than 4.85 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• • • •



Service data Inspection



Electronic control unit connector



Backup value (80°C) is used. DPF regeneration control is stopped. Exhaust gas recirculation control is stopped. Throttle control is stopped.



13: Water Temperature, 25: Water Temp SNSR Voltage 01



: Water temperature sensor



Electrical equipment



#262: Water temperature sensor



Electric circuit diagram



Water temperature sensor system



P0122: Accel Pedal Sensor 1 (warning lamp flashes: 24) Generation condition



Accelerator pedal position sensor 1 voltage remains less than 0.5 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



[When sensor 1 (incorporated in accelerator pedal position sensor) only malfunctions] • Control by sensor 2 (incorporated in accelerator pedal position) [When both sensors 1 and 2 (incorporated in accelerator pedal position sensor) malfunction] • Accelerator switch ON: Accelerator pedal depressed 30 % of stroke Accelerator switch OFF: Controlled with recognition that accelerator pedal is not pressed. • DPF regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Intake throttle control is stopped.



Service data Inspection



13-34



Electronic control unit connector



40: Accel Pedal Sensor Voltage 1, 42: Accel Pedal Position (unfiltered), 43: Accel Pedal Position (filtered) 02



: Accelerator pedal position sensor



Electrical equipment



#324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor system



13 P0123: Accel Pedal Sensor 1 (warning lamp flashes: 24) Generation condition



Accelerator pedal position sensor 1 voltage remains higher than 4.7 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



[When sensor 1 (incorporated in accelerator pedal position sensor) only malfunctions] • Control by sensor 2 (incorporated in accelerator pedal position) [When both sensors 1 and 2 (incorporated in accelerator pedal position sensor) malfunction] • Accelerator switch ON: Accelerator pedal depressed 30% of stroke Accelerator switch OFF: Controlled with recognition that accelerator pedal is not pressed. • DPF regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Intake throttle control is stopped.



Service data Inspection



40: Accel Pedal Sensor Voltage 1, 42: Accel Pedal Position (unfiltered), 43: Accel Pedal Position (filtered)



Electronic control unit connector



02



: Accelerator pedal position sensor



Electrical equipment



#324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor system



P0148: CRS (Fuel Delivery) (warning lamp flashes: 22) Generation condition



Actual common rail pressure remains less than 5.6 % for 30 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 5 second.



Control effected by electronic control unit



Engine stops.



Service data



03: Reference Common Rail Pressure, 04: Actual Common Rail Pressure, 05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Other



• • • • •



Inspection



Check the fuel pipe Fuel filter Injector (Have work performed by Bosch service station.) Supply pump (Have work performed by Bosch service station.) Pressure limiting valve (Have work performed by Bosch service station.)



P0182: Fuel Temp Sensor (inlet) (Low) (warning lamp flashes: 41) Generation condition



Fuel temperature sensor voltage remains less than 0.15 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Engine is controlled using backup value (40°C).



Service data Inspection



Electronic control unit connector



14: Fuel Temperature (inlet), 26: Fuel Temp SNSR Voltage 03



: Fuel temperature sensor



Electrical equipment



#323: Fuel temperature sensor



Electric circuit diagram



Fuel temperature sensor system



P0183: Fuel Temp Sensor (inlet) (High) (warning lamp flashes: 41) Generation condition



Fuel temperature sensor voltage remains higher than 4.8 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Engine is controlled using backup value (40°C).



Service data Inspection



Electronic control unit connector



14: Fuel Temperature (inlet), 26: Fuel Temp SNSR Voltage 03



: Fuel temperature sensor



Electrical equipment



#323: Fuel temperature sensor



Electric circuit diagram



Fuel temperature sensor system



13-35



TROUBLESHOOTING P0192: CRS Pressure SNSR (Low) (warning lamp flashes: 11) Generation condition



Common rail pressure sensor voltage remains less than 0.2 V for 0.25 second.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • • •



Inspection



Common rail pressure open loop control is effected. Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “B4 to B7: Injector Test” are stopped. Turbocharger control is stopped.



Service data



2A: Common Rail Press SNSR Voltage



Electrical equipment



#319: Common rail pressure sensor



Electric circuit diagram



Common rail pressure sensor system



Other



Common rail pressure sensor (Have work performed by Bosch service station.)



P0193: CRS Pressure SNSR (High) (warning lamp flashes: 11) Generation condition



Common rail pressure sensor voltage remains higher than 4.8 V for 0.25 second.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • • •



Inspection



Common rail pressure open loop control is effected. Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “B4 to B7: Injector Test” are stopped. Turbocharger control is stopped.



Service data



2A: Common Rail Press SNSR Voltage



Electrical equipment



#319: Common rail pressure sensor



Electric circuit diagram



Common rail pressure sensor system



Other



Common rail pressure sensor (Have work performed by Bosch service station.)



P0201: Injector M/V-Cylinder 1 (Load) (warning lamp flashes: 37) Generation condition



Injector magnetic valve (No. 1 cylinder) circuit shorted, open-circuited or overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Actuator test Inspection



13-36



Electronic control unit connector



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped.



B4: Injector Test 1 04



: Injector



Electrical equipment



#582: Injector



Other



Injector (No. 1 cylinder) (Have work performed by Bosch service station.)



13 P0202: Injector M/V-Cylinder 2 (Load) (warning lamp flashes: 38) Generation condition



Injector magnetic valve (No. 2 cylinder) circuit shorted, open-circuited or overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Actuator test Inspection



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped.



B6: Injector Test 3



Electronic control unit connector



04



: Injector



Electrical equipment



#582: Injector



Other



Injector (No. 2 cylinder) (Have work performed by Bosch service station.)



P0203: Injector M/V-Cylinder 3 (Load) (warning lamp flashes: 39) Generation condition



Injector magnetic valve (No. 3 cylinder) circuit shorted, open-circuited or overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Actuator test Inspection



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped.



B7: Injector Test 4



Electronic control unit connector



04



: Injector



Electrical equipment



#582: Injector



Other



Injector (No. 3 cylinder) (Have work performed by Bosch service station.)



P0204: Injector M/V-Cylinder 4 (Load) (warning lamp flashes: 8) Generation condition



Injector magnetic valve (No. 4 cylinder) circuit shorted, open-circuited or overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • •



Actuator test Inspection



Electronic control unit connector



Injection quantity is limited. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped.



B5: Injector Test 2 04



: Injector



Electrical equipment



#582: Injector



Other



Injector (No. 4 cylinder) (Have work performed by Bosch service station.)



P0219: Engine Overrunning (warning lamp flashes: 7) Generation condition



Engine speed is higher than specification (4,300 rpm).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Engine is stopped.



Inspection



• Check for occurrences of diagnosis code “P0335: Engine Revolution SNSR”. • If the diagnosis code is redisplayed with the pointer of the tachometer not reaching the red zone, replace the engine electronic control unit. (See “ONVEHICLE INSPECTION AND ADJUSTMENT”.)



Electrical equipment



13-37



TROUBLESHOOTING P0222: Accel Pedal Sensor 2 (warning lamp flashes: 16) Generation condition



Accelerator pedal position sensor 2 voltage remains less than 0.5 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



[When sensor 2 (incorporated in accelerator pedal position sensor) only malfunctions] • Control by sensor 1 (incorporated in accelerator pedal position) [When both sensors 1 and 2 (incorporated in accelerator pedal position sensor) malfunction] • Accelerator switch ON: Accelerator pedal depressed 30 % of stroke Accelerator switch OFF: Controlled with recognition that accelerator pedal is not pressed. • DPF regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Intake throttle control is stopped.



Service data Inspection



Electronic control unit connector



41: Accel Pedal Sensor Voltage 2, 42: Accel Pedal Position (unfiltered), 43: Accel Pedal Position (filtered) 02



: Accelerator pedal position sensor



Electrical equipment



#324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor system



P0223: Accel Pedal Sensor 2 (warning lamp flashes: 16) Generation condition



Accelerator pedal position sensor 2 voltage remains higher than 4.7 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



[When sensor 2 (incorporated in accelerator pedal position sensor) only malfunctions] • Control by sensor 1 (incorporated in accelerator pedal position) [When both sensors 1 and 2 (incorporated in accelerator pedal position sensor) malfunction] • Accelerator switch ON: Accelerator pedal depressed 30 % of stroke Accelerator switch OFF: Controlled with recognition that accelerator pedal is not pressed. • DPF regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Intake throttle control is stopped.



Service data Inspection



Electronic control unit connector



41: Accel Pedal Sensor Voltage 2, 42: Accel Pedal Position (unfiltered), 43: Accel Pedal Position (filtered) 02



: Accelerator pedal position sensor



Electrical equipment



#324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor system



P0251: Common Rail Pressure Defect (warning lamp flashes: 36) Generation condition



Abnormal rise in common rail pressure occurs and common rail pressure limiting valve is caused to open.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration valve control is stopped. • Throttle control is stopped.



Service data



05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Electrical equipment



#587: MPROP (rail pressure control valve), #582: Injector



Other



• Air-bleeding of fuel system (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) • Inspection of fuel piping • Fuel filter • Supply pump (Have work performed by Bosch service station.) • Pressure limiting valve (Have work performed by Bosch service station.) • Injectors (Have work performed by Bosch service station.)



Inspection



13-38



13 P0253: Common Rail Pressure Defect (warning lamp flashes: 22) Generation condition



Abnormal fall in common rail pressure occurs when common rail pressure limiting valve is open (diagnosis code P0251 occurs).



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Engine is stopped.



Service data



05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Electrical equipment



#582: Injector



Other



• Air-bleeding of fuel system (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) • Inspection of fuel piping • Fuel filter • Supply pump (Have work performed by Bosch service station.) • Pressure limiting valve (Have work performed by Bosch service station.) • Injectors (Have work performed by Bosch service station.)



Inspection



P0254: Common Rail Pressure Defect (warning lamp flashes: 23) Generation condition



Abnormal rise in common rail pressure occurs when common rail pressure limiting valve is open (diagnosis code P0251 occurs).



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Engine is stopped.



Service data



05: Difference Common Rail Pressure



Actuator test



B3: Fuel Leak Check



Other



• • • • •



Inspection



Inspection of fuel piping Fuel filter Supply pump (Have work performed by Bosch service station.) Pressure limiting valve (Have work performed by Bosch service station.) Injectors (Have work performed by Bosch service station.)



P0335: Engine Revolution SNSR (warning lamp flashes: 15) Generation condition



No engine speed sensor signals are received.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Control is carried out using cylinder recognition sensors.



Service data Inspection



Electronic control unit connector



01: Engine Revolution 05



: Engine speed sensor



Electrical equipment



#263: Engine speed sensor



Electric circuit diagram



Engine speed sensor system



P0339: Engine Revolution SNSR (Plausi) (warning lamp flashes: 15) Generation condition



Engine speed sensor signal indicates too high speeds (6,000 rpm or higher).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Control is carried out using cylinder recognition sensors.



Service data Inspection



Electronic control unit connector



01: Engine Revolution 05



: Engine speed sensor



Electrical equipment



#263: Engine speed sensor



Electric circuit diagram



Engine speed sensor system



13-39



TROUBLESHOOTING P0340: Camshaft Position SNSR (warning lamp flashes: 12) Generation condition



No cylinder recognition sensor signals are received.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Control is carried out using engine speed sensors.



Service data Inspection



Electronic control unit connector



01: Engine Revolution 06



: Cylinder recognition sensor



Electrical equipment



#320: Cylinder recognition sensor



Electric circuit diagram



Cylinder recognition sensor system



P0344: Camshaft Position SNSR (Plausi) (warning lamp flashes: 12) Generation condition



Cylinder recognition sensor signals are irregular (due to too large inconsistency in angular recognition between camshaft and crankshaft).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Control is carried out using engine speed sensors.



Service data Inspection



Electronic control unit connector



01: Engine Revolution 06



: Cylinder recognition sensor



Electrical equipment



#320: Cylinder recognition sensor



Electric circuit diagram



Cylinder recognition sensor system



P0500: Vehicle Speed Sensor (warning lamp flashes: 25)



Generation condition



When all the conditions below are applicable. • Engine speed: 1000 rpm or more • Clutch signal OFF • Gears engaged despite transmission neutral signal • Vehicle speed remains less than 2 km/h for 60 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit Service data Inspection



Electronic control unit connector



Effects no special control. 18: Vehicle Speed 07



: Vehicle speed sensor



Electrical equipment



#265: Vehicle speed sensor



Electric circuit diagram



Vehicle speed sensor system



P0506: Idle Volume (warning lamp flashes: 52) Generation condition



Idling speed adjustment potentiometer voltage remains less than 0.7 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• When power take-off switch is ON • Accelerator pedal position decided by idling speed adjustment potentiometer is 0 %. • When power take-off switch is OFF • Control is effected with auto idle permanently selected.



Service data Inspection



13-40



Electronic control unit connector



17: Idle Volume Voltage 08



: Idling speed adjustment potentiometer



Electrical equipment



#157: Idling speed adjustment potentiometer



Electric circuit diagram



Idling speed adjustment potentiometer system



13 P0507: Idle Volume (warning lamp flashes: 52) Generation condition



Idling speed adjustment potentiometer voltage remains higher than 4.6 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• When power take-off switch is ON • Accelerator pedal position decided by idling speed adjustment potentiometer is 0 %. • When power take-off switch is OFF • Control is effected with auto idle permanently selected.



Service data Inspection



Electronic control unit connector



17: Idle Volume Voltage 08



: Idling speed adjustment potentiometer



Electrical equipment



#157: Idling speed adjustment potentiometer



Electric circuit diagram



Idling speed adjustment potentiometer system



P0510: Accel SW (warning lamp flashes: 65)



Generation condition



When all the conditions below are applicable. • Multi-Use Tester Service Data “09: Accel Pedal Position (filtered)” exceeds 30 % (Sensor 1 (incorporated in accelerator pedal position sensor) is abnormal). • Accelerator pedal switch input remains ON (accelerator pedal released) for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



09: Accel Pedal Position (filtered), 73: Accel SW 09



: Accelerator pedal switch



Electrical equipment



#324: Accelerator pedal switch (incorporated in accelerator pedal position sensor)



Electric circuit diagram



Accelerator pedal switch system



P0562: Power Supply Voltage (Low) (warning lamp flashes: 33) Generation condition



Power voltage of actuator in the electronic control unit remains below the specified limit for 3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Control of engine is stopped.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P0563: Power Supply Voltage (High) (warning lamp flashes: 33) Generation condition



Power voltage of actuator in the electronic control unit remains over the specified limit for 3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Control of engine is stopped.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P0605: ECU System (Hardware) (warning lamp flashes: 33) Generation condition



Some error has occurred in reading or writing process.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



No particular control takes place.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



13-41



TROUBLESHOOTING P0607: ECU system (warning lamp flashes: 33) Generation condition



Diagnosis code is generated under either of the following conditions. • Power supply to injector driving IC in the electronic control unit is abnormal. • Injector driving IC or timer IC in the electronic control unit is abnormal. • Power voltage monitoring circuit in the electronic control unit malfunctions.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Engine is stopped.



Inspection



Replace engine electronic unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P060B: A/D Converter (warning lamp flashes: 33) Generation condition



Unit (A/D converter) in electronic control unit is abnormal.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Engine is stopped.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P061B: ECU Performance (Calc) (warning lamp flashes: 33) Generation condition



Abnormal condition has occurred in arithmetic processing inside engine electronic control unit.



Recoverability



System recovers if any valid signal is input with starter switch in ON position.



Control effected by electronic control unit



No particular control takes place.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P061C: ECU Performance (Ne) (warning lamp flashes: 33) Generation condition



Abnormal condition has occurred in engine speed processing inside engine electronic control unit.



Recoverability



System recovers if any valid signal is input with starter switch in ON position.



Control effected by electronic control unit



No particular control takes place.



Inspection



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



P062D: Injector Bank 1 (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 1 and No. 4 cylinders) has stopped functioning temporarily.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



13-42



Injector (for No. 1 and No. 4 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B4 to B7: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (for No. 1 cylinder) or (for cylinder No. 4)



Other



Injector (Have work performed by Bosch service station.)



13 P062E: Injector Bank 2 (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 2 and No. 3 cylinders) has stopped functioning temporarily.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Injector (for No. 2 and No. 3 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B4 to B7: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (for No. 2 cylinder) or (for cylinder No. 3)



Other



Injector (Have work performed by Bosch service station.)



P0642: Sensor Supply Voltage 1 (Low) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 1) is lower than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



0A: Accel Pedal Sensor Voltage 1, 17: Idle Volume Voltage 02



: Accelerator pedal position sensor,



08



: Idling speed adjustment potentiometer



Electrical equipment



#157: Idling speed adjustment potentiometer, #324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor (sensor 1), Idling speed adjustment potentiometer system



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



P0643: Sensor Supply Voltage 1 (High) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 1) is higher than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit Service data Electronic control unit connector Inspection



Effects no special control. 0A: Accel Pedal Sensor Voltage 1, 17: Idle Volume Voltage. 02



: Accelerator pedal position sensor,



08



: Idling speed adjustment potentiometer



Electrical equipment



#157: Idling speed adjustment potentiometer, #324: Accelerator pedal position sensor



Electric circuit diagram



Accelerator pedal position sensor (sensor 1), Idling speed adjustment potentiometer system



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



13-43



TROUBLESHOOTING P0652: Sensor Supply Voltage 2 (Low) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 2) is lower than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



0B: Accel Pedal Sensor Voltage 2, 24: Boost Press SNSR Voltage, 2B: Exhaust gas pressure 02



: Accelerator pedal position sensor,



18



: Diesel particulate filter absolute pressure sensor



Electrical equipment



#318: Boost pressure sensor, #324: Accelerator pedal position sensor, #334: Diesel particulate filter absolute pressure sensor



Electric circuit diagram



Boost pressure sensor, Accelerator pedal position sensor (sensor 2), Diesel particulate filter absolute pressure sensor system



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



P0653: Sensor Supply Voltage 2 (High) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 2) is higher than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



0B: Accel pedal Sensor Voltage 2, 24: Boost Press SNSR Voltage, 2B: Exhaust gas pressure 02



: Accelerator pedal position sensor,



18



: Diesel particulate filter absolute pressure sensor



Electrical equipment



#318: Boost pressure sensor, #324: Accelerator pedal position sensor, #334: Diesel particulate filter absolute pressure sensor



Electric circuit diagram



Boost pressure sensor, Accelerator pedal position sensor (sensor 2), Diesel particulate filter absolute pressure sensor system



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



P0657: M/V Voltage (Low) (warning lamp flashes: 79) Generation condition



Magnetic valve power supply remains low for 0.5 second.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



No specific control is effected (Failure occurs owing to abnormality of injector circuit).



Inspection



Electrical equipment



#582: Injector



Electric circuit diagram



Injector system



P0698: Sensor Supply Voltage 3 (Low) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 3) is lower than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



13-44



05: Difference Common Rail Pressure, 1B: PTO Accel Sensor Voltage, 2A: Common Rail Press SNSR Voltage 15



: Power take-off load sensor,



17



: Diesel particulate filter differential pressure sensor



Electrical equipment



#317: Power take-off load sensor, #319: Common rail pressure sensor, #334: Diesel particulate filter differential pressure sensor



Electric circuit diagram



Power take-off load sensor, Common rail pressure sensor, Diesel particulate filter differential pressure sensor system.



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



13 P0699: Sensor Supply Voltage 3 (High) (warning lamp flashes: 81) Generation condition



Engine electronic control unit internal voltage (sensor supply voltage 3) is higher than specification.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Electronic control unit connector Inspection



05: Difference Common Rail Pressure, 1B: PTO Accel Sensor Voltage, 2A: Common Rail Press SNSR Voltage 15



: Power take-off load sensor,



17



: Diesel particulate filter differential pressure sensor



Electrical equipment



#317: Power take-off load sensor, #319: Common rail pressure sensor, #334: Diesel particulate filter differential pressure sensor



Electric circuit diagram



Power take-off load sensor, Common rail pressure sensor, Diesel particulate filter differential pressure sensor system.



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



P1171: Q Adjustment Resistor (Low) (warning lamp flashes: 34) Generation condition



Voltage of fuel injection rate adjustment resistor remains less than 0.2 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Control is made using a backup value (No. 1).



Service data Inspection



Electronic control unit connector



19: Q Adjustment Resistor No. 10



: Fuel injection rate adjustment resistor



Electrical equipment



#828: Fuel injection rate adjustment resistor



Electric circuit diagram



Fuel injection rate adjustment resistor system



P1172: Q Adjustment Resistor (High) (warning lamp flashes: 34) Generation condition



Voltage of fuel injection rate adjustment resistor remains higher than 4.8 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Control is made using a backup value (No. 1).



Service data Inspection



Electronic control unit connector



19: Q Adjustment Resistor No. 10



: Fuel injection rate adjustment resistor



Electrical equipment



#828: Fuel injection rate adjustment resistor



Electric circuit diagram



Fuel injection rate adjustment resistor system



P1466: Auxiliary Brake M/V 2 (Plausi) (warning lamp flashes: 94) Generation condition



Exhaust shutter 3-way magnetic valve 2 is abnormal. (Errors unrecognizable by engine-electronic control unit are detected.)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



Service data



84: Exhaust Brake M/V 2



Actuator test



A7: Auxiliary Brake M/V 2



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 2 system



13-45



TROUBLESHOOTING P1467: Auxiliary Brake M/V 2 (Low) (warning lamp flashes: 94) Generation condition



Exhaust shutter 3-way magnetic valve 2 circuit is shorted to ground.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



Service data



84: Exhaust Brake M/V 2



Actuator test



A7: Auxiliary Brake M/V 2



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 2 system



P1468: Auxiliary Brake M/V 2 (High) (warning lamp flashes: 94) Generation condition



Exhaust shutter 3-way magnetic valve 2 circuit is shorted to power supply.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



Service data



84: Exhaust Brake M/V 2



Actuator test



A7: Auxiliary Brake M/V 2



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 2 system



P1577: Segment Sensor Supply Voltage (warning lamp flashes: 81) Generation condition



Cylinder recognition sensor voltage remains less than 0 V for 20 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit Service data Inspection



Electronic control unit connector



Effects no special control. 01: Engine Revolution 06



: Cylinder recognition sensor



Electrical equipment



Cylinder recognition sensor



Electric circuit diagram



Cylinder recognition sensor system



P1578: Segment Sensor Supply Voltage (warning lamp flashes: 81) Generation condition



Cylinder recognition sensor voltage remains higher than 5 V for 20 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Inspection



13-46



Electronic control unit connector



01: Engine Revolution 06



: Cylinder recognition sensor



Electrical equipment



Cylinder recognition sensor



Electric circuit diagram



Cylinder recognition sensor system



13 P2146: Injector Bank 1 (Plausibility) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 1 and No. 4 cylinder) circuit open-circuited.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Injector (for No. 1 and No. 4 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (No. 1 cylinder) or (No. 4 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



P2147: Injector Bank 1 (Low) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 1 and No. 4 cylinder) circuit shorted to ground.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Electrical equipment



Injector (for No. 1 and No. 4 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



#582: Injector



Electric circuit diagram



Injector (No. 1 cylinder) or (No. 4 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



P2148: Injector Bank 1 (High) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 1 and No. 4 cylinder) circuit shorted to power supply.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Injector (for No. 1 and No. 4 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (No. 1 cylinder) or (No. 4 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



13-47



TROUBLESHOOTING P2149: Injector Bank 2 (Plausibility) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 2 and No. 3 cylinder) circuit open-circuited.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Injector (for No. 2 and No. 3 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (No. 2 cylinder) or (No. 3 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



P2150: Injector Bank 2 (Low) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 2 and No. 3 cylinder) circuit shorted to ground.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Electrical equipment



Injector (for No. 2 and No. 3 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



#582: Injector



Electric circuit diagram



Injector (No. 2 cylinder) or (No. 3 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



P2151: Injector Bank 2 (High) (warning lamp flashes: 82) Generation condition



Injector magnetic valve (for No. 2 and No. 3 cylinder) circuit shorted to power supply.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Electronic control unit connector Inspection



Injector (for No. 2 and No. 3 cylinders) is stopped. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Actuator tests “A5: VGT” is stopped. Actuator tests “B3 to B6: Injector Test” are stopped. 04



: Injector



Electrical equipment



#582: Injector



Electric circuit diagram



Injector (No. 2 cylinder) or (No. 3 cylinder) system



Other



Injector (Have work performed by Bosch service station.)



P2169: Exhaust Valve Act (Open) (warning lamp flashes: 93) Generation condition



Exhaust shutter 3-way magnetic valve 1 circuit is opened or overloaded.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



13-48



Service data



83: Exhaust Brake M/V 1



Actuator test



A6: Auxiliary Brake M/V 1



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 1 system



13 P2170: Exhaust Valve Act (Gnd) (warning lamp flashes: 93) Generation condition



Exhaust shutter 3-way magnetic valve 1 circuit is shorted to ground.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



Service data



83: Exhaust Brake M/V 1



Actuator test



A6: Auxiliary Brake M/V 1



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 1 system



P2171: Exhaust Valve Act (Batt) (warning lamp flashes: 93) Generation condition



Exhaust shutter 3-way magnetic valve 1 circuit is shorted to power supply.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Control of auxiliary brake is deactivated. • DPF regeneration control is stopped.



Inspection



Service data



83: Exhaust Brake M/V 1



Actuator test



A6: Auxiliary Brake M/V 1



Electronic control unit connector



12



: Exhaust shutter 3-way magnetic valve



Electrical equipment



#565: Exhaust shutter 3-way magnetic valve



Electric circuit diagram



Exhaust shutter 3-way magnetic valve 1 system



P2228: Atm Press SNSR (Low) (warning lamp flashes: 19) Generation condition



Voltage of atmospheric pressure sensor (inside engine electronic control unit) remains less than 2 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Backup value (101.3 kPa) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



15: Atmospheric Pressure



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



P2229: Atm Press SNSR (High) (warning lamp flashes: 19) Generation condition



Voltage of atmospheric pressure sensor (inside engine electronic control unit) remains higher than 4.7 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Backup value (101.3 kPa) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



15: Atmospheric Pressure



Other



Replace engine electronic control unit (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



13-49



TROUBLESHOOTING P253C: PTO Acc (Low) (warning lamp flashes: 61) Generation condition



When all the conditions below are applicable. • Power take-off switch: ON • Power take-off load sensor voltage remains less than 0.5 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Lever position during power take-off operation is fixed at 0 %.



Service data Inspection



Electronic control unit connector



1A: PTO Accel Position, 1B: PTO Accel Sensor Voltage 15



: Power take-off load sensor



Electrical equipment



#317: Power take-off load sensor



Electric circuit diagram



Power take-off load sensor system



P253D: PTO Acc (High) (warning lamp flashes: 61) Generation condition



When all the conditions below are applicable. • Power take-off switch: ON • Power take-off load sensor voltage remains higher than 3.5 V for 1 second.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Lever position during power take-off operation is fixed at 0 %.



Service data Inspection



Electronic control unit connector



1A: PTO Accel Position, 1B: PTO Accel Sensor Voltage 15



: Power take-off load sensor



Electrical equipment



#317: Power take-off load sensor



Electric circuit diagram



Power take-off load sensor system



P254C: PTO Ne (Low) (warning lamp flashes: 62) Generation condition



When all the conditions below are applicable. • Power take-off switch: ON • Power take-off resistor voltage remains less than 0.2 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Resistance of power take-off resistor is fixed at 0 Ω



Service data Inspection



Electronic control unit connector



1C: PTO Adjustment Resistor No. 16



: Power take-off resistor



Electrical equipment



#828: Power take-off resistor



Electric circuit diagram



Power take-off resistor system



P254D: PTO Ne (High) (warning lamp flashes: 62) Generation condition



When all the conditions below are applicable. • Power take-off switch: ON • Power take-off resistor voltage remains higher than 4.8 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Resistance of power take-off resistor is fixed at 0 Ω



Service data Inspection



13-50



Electronic control unit connector



1C: PTO Adjustment Resistor No. 16



: Power take-off resistor



Electrical equipment



#828: Power take-off resistor



Electric circuit diagram



Power take-off resistor system



13 P2670: MPROP Voltage (Low) (warning lamp flashes: 36) Generation condition



MPROP (rail pressure control valve) power supply is low.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration control is stopped. • Throttle control is stopped.



Electronic control unit connector Inspection



12



: MPROP (rail pressure control valve)



Electrical equipment



#574: MPROP (rail pressure control valve)



Electric circuit diagram



MPROP (rail pressure control valve) system



Other



• MPROP (rail pressure control valve) (Have work performed by Bosch service station.) • Supply pump (Have work performed by Bosch service station.)



U0001: CAN No Data Received (warning lamp flashes: 95) Generation condition



Transmission of controller area network signal from engine-electronic control unit is faulty (abnormality in controller area network communication)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Electronic control unit connector Inspection



14



: Controller area network resistor



Electrical equipment



#828: Controller area network resistor (Turbocharger electronic drive unit connection side)



Electric circuit diagram



Controller area network resistor system (Turbocharger electronic drive unit connection side)



U0073: CAN Communication Bus Off (warning lamp flashes: 95)



Generation condition



Engine-electronic control unit detects abnormality in controller area network communication (Controller area network signal transmission or reception fail more than specified times) Diagnosis code P1632, P1635 or P1645 may occur simultaneously (if these diagnosis codes occur at the same time, possibility is high that harness somewhere near engine electronic control unit is faulty)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• • • •



Electronic control unit connector Inspection



Transmission of controller area network signal stopped DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. 14



: Controller area network resistor



Electrical equipment



#828: Controller area network resistor (Turbocharger electronic drive unit connection side)



Electric circuit diagram



Controller area network resistor system (Turbocharger electronic drive unit connection side)



13-51



TROUBLESHOOTING 4. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No.



Item



Data



01 Engine Revolution



.rpm



02 Reference Injection Quantity



.



%



Inspection condition Racing (engine running) Engine is stopped. (Starter switch in ON position)



Reference Common Rail Pressure



.



%



Engine is stopped (Starter switch in ON position)



04 Actual Common Rail Pressure



.



%



Engine is stopped (Starter switch in ON position)



Difference Common Rail Pressure



.



%



Idling



03



05



Requirement Value corresponds to tachometer indication. Fuel injection quantity necessary for engine start is indicated (variable according to coolant temperature) Target common rail pressure necessary for engine start is indicated Common rail pressure necessary for engine start is indicated 0%



06 EGR Position



.



%



See Gr17.



–



07 Intake Throttle Position



.



%



See Gr17.



–



0A Accel Pedal Sensor Voltage 1



.



V



0B Accel Pedal Sensor Voltage 2



.



V



Accelerator pedal not pressed Accelerator pedal gradually pressed Accelerator pedal fully pressed Accelerator pedal not pressed Accelerator pedal gradually pressed Accelerator pedal fully pressed Accelerator pedal gradually pressed from released position Accelerator pedal gradually pressed from released position



08



Accel Pedal Position (unfiltered)



.



%



09



Accel Pedal Position (filtered)



.



%



0% Value gradually increases. 100 % 0% Value gradually increases. 100 % 0.85 to 4.15 V 0.85 to 4.15 V



0C Boost Pressure



.



kPa



See Gr15.



0D Intake Air Temperature 1



.



°C



When vehicle is running



0E Intake Air Temperature 2



.



°C



See Gr17.



–



.°C .°C



See Gr15. See Gr15.



– –



0F Exhaust gas temperature 1 10 Exhaust gas temperature 2 Difference pressure across 11 DPF 12 Exhaust gas pressure



.



kPa



See Gr15.



–



.



kPa



See Gr15.



– Value corresponds to ambient temperature. Value gradually increases. Value gradually decreases. Value corresponds to ambient temperature. Value gradually increases. Value gradually decreases. 101 kPa 95 kPa



°C



Engine in process of warming up Engine stopped after warming up Engine cold



14 Fuel Temperature (inlet)



.



°C



15 Atmospheric Pressure



.



kPa



16 Air mass flow



.



g/s



See Gr17.



V



AUTO (0°) SLOW (30°) FAST (300°) Without idle speed adjustment potentiometer



17 Idle Volume Voltage



18 Vehicle Speed



13-52



.



Equal to ambient temperature or ambient temperature + 50°C



.



Engine cold 13 Water Temperature



–



.km/h



Engine in process of warming up Engine stopped after warming up Altitude: 0 m Altitude: 600 m



Vehicle in motion



– 4.0 ± 0.1 V 3.0 ± 0.2 V 1.0 ± 0.1 V 4.0 ± 0.1 V Value corresponds to speedometer indication.



13 No.



Item Data Inspection condition Q Adjustment Resistor No. 1/2/3/4/5/6/7/8/9/10/ 19 (Part name: Fuel injection rate – 11/NON adjustment resistor) 1A PTO Accel Position . % Power take-off is operated (MIN-MAX) 1B PTO Accel Sensor Voltage . V Power take-off is operated (MIN-MAX)



1C PTO Adjustment Resistor No. 1D Power Supply Voltage



1/2/3/4/5/6/7/8/9/10/ 11/NON .



22 VGT Position 23



Atmospheric Press SNSR Voltage



Starter switch ON



V .m3



1E Exhaust Gas Flow 21 Catalyst Temp SNSR



/h



. .



.°C



See Gr15. See Gr15.



%



See Gr15.



mV



24 Boost Press SNSR Voltage



.



mV



25 Water Temp SNSR Voltage



.



mV



26 Fuel Temp SNSR Voltage



.



–



mV



Sensor circuit open-circuited or shorted to power supply. Sensor circuit shorted to ground. See Gr15. Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground



Requirement Number matches number marked on fuel injection rate adjustment resistor. 0 to 100 % 1.0 to 3.0 V Number matches number maked on power take-off resistor. Value matches battery voltage. – – – approx. 5000 mV approx. 0 mV – approx. 5000 mV approx. 0 mV approx. 5000 mV approx. 0 mV



Intake Air Temp SNSR2 Volt27 age



.



mV



Intake Air Temp SNSR1 Voltage



.



mV



29 Catalyst Temp SNSR Voltage



.



mV



.



mV



.



mV



Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground See Gr15. Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground See Gr15.



.



mV



See Gr15.



–



.



mV



See Gr15.



–



28



2A



Common Rail Press SNSR Voltage



2B Exhaust gas pressure Exhaust gas temp SNSR1 2C Voltage Exhaust gas temp SNSR2 2D Voltage 71 Starter SW (S)



ON/OFF



72 Starter SW (M)



ON/OFF



73 Accel SW



ON/OFF



74 DPF SW Auxiliary Brake SW 75 (Part name: Exhaust brake switch)



ON/OFF



77 Clutch SW (INOMAT)



ON/OFF



78 Neutral SW



ON/OFF



79 Idle Up Cancel SW



ON/OFF



7A Air conditioner SW 1



ON/OFF



ON/OFF



See Gr17.



Engine cranked by means of starter switch. Starter switch in position except START Starter switch in ON position Starter switch in position except ON Accelerator pedal not pressed Accelerator pedal pressed See Gr15. Combination switch ON



– approx. 5000 mV approx. 0 mV – approx. 5000 mV approx. 0 mV –



ON OFF ON OFF ON OFF – ON



Combination switch OFF



OFF



Clutch pedal not pressed Clutch pedal pressed Gear shift lever in position except N Gear shift lever in N position Gear shift lever in position except N Gear shift lever in N position Air conditioner compressor running Air conditioner compressor not running [Actuator test] B0: Air Conditioner SW



ON OFF ON OFF ON OFF ON OFF



13-53



TROUBLESHOOTING No.



Item



Data



7B Idle Up Signal



ON/OFF



7E PTO SW



ON/OFF



7F Diagnosis SW



ON/OFF



80 Memory Clear



ON/OFF



81 Parking Break SW



ON/OFF



83 Exhaust Brake M/V 1



ON/OFF



84 Exhaust Brake M/V 2



ON/OFF



85 Auxiliary Brake Indicator Lamp ON/OFF



86 87 88 89



Glow Relay Glow Relay Indicator Lamp Starter Safety Relay EDU Power Relay



ON/OFF ON/OFF ON/OFF ON/OFF



8A MIL Lamp



ON/OFF



8B Diagnosis Lamp



ON/OFF



8C DPF Indicator Lamp



ON/OFF



13-54



Inspection condition Requirement Lighting switch ON ON Lighting switch OFF OFF Switch ON ON Switch OFF OFF Diagnosis switch ON (fuse fitted) ON Diagnosis switch OFF (fuse removed) OFF Memory clear switch ON ON (fuse fitted) Memory clear switch OFF OFF (fuse removed) Vehicle parked ON Vehicle in motion OFF Exhaust shutter 3-way magnetic valve ON ON Exhaust shutter 3-way magnetic valve OFF OFF [Actuator test] A6: Auxiliary Brake M/V 1 Exhaust shutter 3-way magnetic valve ON 2 ON Exhaust shutter 3-way magnetic valve OFF 2 OFF [Actuator test] A7: Auxiliary Brake M/V 2 Exhaust shutter 3-way magnetic valve ON ON Exhaust shutter 3-way magnetic valve OFF OFF [Actuator test] A8: Auxiliary Brake Indicator Lamp See Gr54. – See Gr54. – See Gr54. – See Gr15, 17. – Starter switch ON (engine not started) ON No error after engine startup OFF [Actuator test] AD: MIL Lamp Starter switch ON (engine not started) ON No error after engine startup OFF [Actuator test] AE: Diagnosis Lamp See Gr15. –



13 5. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



Item



Explanation



Confirmation method



A1 EGR



See Gr17.



–



A2 DPF Regeneration



See Gr15.



–



A4 Intake Throttle 1



See Gr17.



–



A5 VGT



See Gr15.



–



Exhaust shutter 3-way magnetic valve 1 drive signal Auxiliary Brake M/V 1 [Can be executed when the following conditions are satisfied] A6 (Part name: Exhaust shutter 3- • Vehicle: stationary (vehicle speed 0 km/h) way magnetic valve) • Starter switch: ON • Engine: stopped



Operating sound of magnetic valve [Service data] 83: Exhaust Brake M/V 1



Exhaust shutter 3-way magnetic valve 2 drive signal Auxiliary Brake M/V 2 [Can be executed when the following conditions are satisfied] A7 (Part name: Exhaust shutter 3- • Vehicle: stationary (vehicle speed 0 km/h) way magnetic valve) • Starter switch: ON • Engine: stopped



Operating sound of magnetic valve [Service data] 84: Exhaust Brake M/V 2



Exhaust brake indicator lamp drive signal [Can be executed when the following conditions are satisfied] A8 Auxiliary Brake Indicator Lamp • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON • Engine: stopped



ON/OFF condition of indicator lamp [Service data] 85: Auxiliary Brake Indicator Lamp



A9 Relay for Glow Relay



See Gr54.



–



AA Glow Indicator Lamp



See Gr54.



–



AB Starter Safety Relay



See Gr54.



–



AC EDU Relay



See Gr15, 17.



AD MIL Lamp



Engine warning lamp (orange) drive signal [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Transmission: Neutral • Engine: stopped



ON/OFF condition of warning lamp (orange) [Service data] 8A: MIL Lamp



AE Diagnosis Lamp



Engine warning lamp (red) drive signal [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Transmission: Neutral • Engine: stopped



ON/OFF condition of warning lamp (red) [Service data] 8B: Diagnosis Lamp



AF DPF Indicator Lamp



See Gr15.



B0 Air Conditioner SW



Air Conditioner drive signal [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON • Engine: Idling



ON/OFF condition of air conditioner [Service data] 7A: Air Conditioner SW



B1 Idle Up Cancel SW



Idle up cancel drive signal [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON • Engine: stopped



ON/OFF condition of idle up cancel signal [Service data] 79: Idle Up Cancel SW



B2 Fuel Leak Check



Rail pressure increased on a constant slope (for 6 seconds) Check that no fuel leaks [Can be executed when the following conditions are satisfied] from fuel system. • Vehicle: stationary (vehicle speed 0 km/h) • Transmission: Neutral • Diagnosis switch: OFF (with fuse removed)



B3 Injector Test 1



B4 Injector Test 2



Selected injector magnetic valve forcibly deactivated [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Engine speed: Below 1500 rpm • Transmission: Neutral • No active diagnosis code generated



–



–



Check that injector magnet valve for No. 1 cylinder stops operating. Check that injector magnet valve for No. 4 cylinder stops operating.



B5 Injector Test 3



Check that injector magnet valve for No. 2 cylinder stops operating.



B6 Injector Test 4



Check that injector magnet valve for No. 3 cylinder stops operating.



13-55



TROUBLESHOOTING 6. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 , and so on) correspond to the similarly printed reference numbers in section “3. Inspections Based on Diagnosis Codes”.



6.1 Electronic control unit connector terminal layout



6.2 Inspection instructions • Some inspections are performed with the connectors removed. Others are performed with the connectors fitted.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes.



13-56



13 Check item 01 Resistance of water temperature sensor



02 Output voltage of accelerator pedal position sensor



03 Resistance of fuel temperature sensor



04 Resistance of injector magnetic valve



05 Resistance of engine speed sensor



06 Resistance of cylinder recognition sensor



07 Output voltage of vehicle speed sensor



08 Output voltage of idling speed adjustment potentiometer



Measurement method [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A40-A41 • 20°C: 2.45 ± 0.14 kΩ • 80°C: 0.32 kΩ (reference value) • 110°C: 141.7 ± 2 Ω [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–) B34-B33 and B45 (accelerator pedal position sensor 1) B46-B33 and B45 (accelerator pedal position sensor 2) • With accelerator pedal not pressed: 0.85 ± 0.1 V • With accelerator pedal pressed: 4.15 ± 0.1 V [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A89-A65 • 20°C: 2.45 +0.14 –0.13 kΩ • 80°C: 0.318 ± 0.008 kΩ • 110°C: 0.1417 ± 0.0018 kΩ [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A72-A23 (injector magnetic valve: No. 1 cylinder) A96-A24 (injector magnetic valve: No. 2 cylinder) A71-A46 (injector magnetic valve: No. 3 cylinder) A95-A48 (injector magnetic valve: No. 4 cylinder) • 0.255 ± 0.04 Ω [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A10-A9 • 860 ± 86 Ω (20°C) [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A78-A83 (+5 V to GND) • 200 to 1,800 Ω [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) • Turn wheels slowly using chassis dynamometer. [Requirements] Terminals (+)-(–): A67-chassis ground • High pulse voltage: Approx. 8 ± 1 V • Low pulse voltage: 0.5 V or lower [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): A12-A36 • AUTO position: 4.0 ± 0.1 V • SLOW position: 3.0 ± 0.1 V • FAST position: 1.0 ± 0.1 V



13-57



TROUBLESHOOTING Check item 09 Operating voltage of accelerator pedal switch



10 Resistance of fuel injection rate adjustment resistor



11 Resistance of MPROP (rail pressure control valve)



Measurement method [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): A20-B33 and B45 • With accelerator pedal pressed: 0 V • With accelerator pedal not pressed: 5 V [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A35-A88 • No. 1 resistor: 270 ± 13.5 Ω • No. 2 resistor: 510 ± 25.5 Ω • No. 3 resistor: 820 ± 41 Ω • No. 4 resistor: 1,300 ± 65 Ω • No. 5 resistor: 2,000 ± 100 Ω • No. 6 resistor: 3,300 ± 165 Ω • No. 7 resistor: 5,600 ± 280 Ω • No. 8 resistor: 15,000 ± 750 Ω • No. 9 resistor: 390 ± 19.5 Ω • No. 10 resistor: 4,300 ± 215 Ω • No. 11 resistor: 9,100 ± 455 Ω [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A69-A21, A69-A2, A3-A21, A3-A2 • 2.6 to 3.15 Ω



[Conditions] • Starter switch ON Voltage of exhaust shutter 3-way magnetic valve • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): exhaust shutter 3-way magnetic valve 1 (A76-A6) exhaust shutter 3-way magnetic valve 2 (B21-B26) • With exhaust brake operating: Corresponding to battery voltage • With exhaust brake not operating: 0 V 12



13 Resistance of intake air temperature sensor 1



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A63-A32 • 0°C: 15 +3.78 –2.94 kΩ • 20°C: 6.514 +1.437 –1.147 kΩ • 80°C: 0.874 +0.136 –0.115 kΩ



14 Resistance of controller area network resistor



15 Output voltage of power take-off load sensor



13-58



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: B5-B6 • 120 ± 6 Ω [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): A15-A16 • Idling: 0.85 ± 0.1 V • Full load: 3.0 ± 0.1 V



13 16 Resistance of power take-off resistor



17 Voltage of diesel particulate filter differential pressure sensor



18 Voltage of diesel particulate filter absolute pressure sensor



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A35-A88 • No. 1 resistor: 270 ± 13.5 Ω • No. 2 resistor: 510 ± 25.5 Ω • No. 3 resistor: 820 ± 41 Ω • No. 4 resistor: 1,300 ± 65 Ω • No. 5 resistor: 2,000 ± 100 Ω • No. 6 resistor: 3,300 ± 165 Ω • No. 7 resistor: 5,600 ± 280 Ω • No. 8 resistor: 15,000 ± 750 Ω • No. 9 resistor: 390 ± 19.5 Ω • No. 10 resistor: 4,300 ± 215 Ω • No. 11 resistor: 9,100 ± 455 Ω [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements]



Terminals (+)-(–): A61-A85 • 5V



Terminals (+)-(–): A84-A85 • 1 to 4.5 V [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements]



Terminals (+)-(–): A60-A42 • 5V



Terminals (+)-(–): A8-A42 • 1.875 to 4.5 V



13-59



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspecting and Adjusting No-load Minimum and Maximum Speeds Service standards Location



Maintenance item



–



Minimum no-load speed (idling speed)



–



Maximum no-load speed



Standard value



Limit



Remedy



600 ± 25 rpm



–



Inspect



3700 rpm



–



Inspect



[Work before inspection] • Before starting the inspection and adjustment, carry out the following preparatory steps: • Warm up the engine until the engine coolant temperature is approximately 80 to 95°C; (Check by Multi-Use Tester service data “13: Water temperature”.) • Turn off all lamps and accessories; • Place the transmission shift lever into the N position; • Set the steering wheel at the straight-ahead position; and • Attach a tachometer. [Inspection] (1) No-load minimum speed • Without pressing the accelerator pedal, measure the engine speed. • If the measurement is not within the standard value range, inspect the accelerator position sensor. (See “ENGINE CONTROL”.) • If no defects are evident during the above inspection, check diagnosis code from engine-electronic control unit or fuel system. (2) No-load maximum speed • Press the accelerator pedal as far as it will go. • With the accelerator pedal touching the lever stopper, measure the engine speed. • If the measurement is not within the standard value range, inspect the accelerator position sensor. (See “ACCELERATOR PEDAL”.) • If no defects are evident during the above inspection, check diagnosis code from engine-electronic control unit or fuel system.



13-60



13 2. Air-bleeding of Fuel System Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened Plug



Tightening torque



Remarks



10 ± 2 {1 ± 0.2}



–



• Loosen one of the air vent plugs on the fuel filter. • Move the priming pump up and down to pump out the fuel. • Continue operating the priming pump until the fuel flowing out of the plug is free of air bubbles. • When no more air bubbles are evident, tighten the air vent plug to the specified torque. • Feed the fuel some more by operating the priming pump further until a strong resistance is felt. • When the fuel temperature is low, you may not feel the resistance. Be sure to operate the priming pump several times even in such a case. • Wipe up any spilled fuel and start the engine. • Check that there is no fuel leakage.



WARNING • Fuel is highly flammable. Keep it away from flames and sources of heat. • To avoid risk of fire, wipe up any spilled fuel.



13-61



ON-VEHICLE INSPECTION AND ADJUSTMENT 3. Fuel Filter Replacement Tightening torque (Unit: N·m {kgf·m}) Mark



Tightening torque



Remarks



–



Water separator sensor



Parts to be tightened



5 ± 1 {0.5 ± 0.1}



–



–



Case



30 ± 2 {3.1 ± 0.2}



–



Lubricant and/or sealant Mark –



Points of application O-ring



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Special tools Mark



Tool name and shape



Part No.



Filter wrench



MH063203



Application



Removal and installation of case



[Removal] • Loosen the water separator sensor and drain fuel from the case. • Remove the case using .



WARNING • Fuel is highly flammable. Keep it away from flames and sources of heat. • To avoid risk of fire, wipe up any spilled fuel.



CAUTION • Be careful not to damage the case. [Installation] • Clean the O-ring mounting surface of the fuel filter head and the O-ring groove of the case.



13-62



13 • Replace the filter element and O-ring with new one. • Apply a thin coat of engine oil to the O-ring, and install it on the case and water separator sensor.



CAUTION • Be sure to use only genuine MITSUBISHI filter elements. The use of non-genuine fuel filters can cause engine failure. • Prevent fine dust particles from entering the fuel filter and fuel hose, as they can cause problems such as faulty fuel injection.



• Use to tighten the case to the specified torque. • Install the water separator sensor, and then air-bleed the fuel system. • Start the engine, and check that there is no fuel leakage. • Reinstall the fuel filter if there is any leakage.



4. Registration of Vehicle Identification Number (VIN) • A vehicle identification number (VIN) must be written (registered) to the engine electronic control unit after: • The current engine electronic control unit is replaced with a new one. • The current engine electronic control unit is replaced with one that has been used on another vehicle. • For the details of the replace work, consult your nearest MITSUBISHI FUSO distributor or dealer.



13-63



SUPPLY PUMP



13-64



13 Removal sequence 1 2 3 4 5 6 7 8 9 10



Eyebolt Oil pipe Eyebolt Eyebolt Fuel return pipe A Fuel return pipe B Fuel pipe Fuel temperature sensor O-ring Eyebolt



11 12 13 14 15 16 17 18 19 20



21 22 23 24 25



Clamp Fuel suction pipe Fuel hose Eyebolt Fuel suction pipe Idler washer A Idler gear B Idler shaft A Supply pump gear Flange plate



O-ring Key Supply pump O-ring O-ring



*a: *b::



Timing gear case EGR cooler bracket Non-reusable parts EGR: Exhaust gas recirculation



WARNING • Fuel is highly flammable. Keep it away from flames and sources of heat. • Thoroughly wipe up any spilled fuel. Otherwise, it may catch fire.



CAUTION • Any contamination of the supply pump, even if it is minor, will greatly affect the performance of the engine. After removing pipes and hoses or other parts, plug the openings with covers. Wash eyebolts and gaskets in light oil and keep them away from contaminants. • For servicing the supply pump assembly, contact a Bosch service station.



Installation sequence Follow the removal sequence in reverse.



CAUTION • Make sure that the connector of MPROP (rail pressure control valve) is connected to the harness at engine side before starting the engine. If the engine is started without connecting the MPROP connector, the engine electronic control unit cannot control the supply pump and the fault of the engine may result.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Eyebolt (oil pipe mounting) Eyebolt (fuel return pipe A mounting) Fuel pipe Fuel temperature sensor Eyebolt (fuel return pipe B mounting) Eyebolt (fuel suction pipe mounting) Bolt (idler gear B mounting) Nut (supply pump gear mounting) Nut (supply pump mounting)



Tightening torque



Remarks



20 {2.0}



–



38.2 {3.9}



–



25 {2.6}



–



19.6 {2.0}



–



39 {4.0}



–



37 to 53 {3.8 to 5.4}



–



100 to 110 {10.2 to 11.2}



–



25 to 28 {2.5 to 2.9}



–



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Lubricant and/or sealant Mark



Points of application O-ring



13-65



SUPPLY PUMP Special tools Mark



Tool name and shape



Part No.



Front hub and flange yoke holder



MB990767



Application



Rotate crankshaft pulley



Installation procedure Installation: Supply pump • Remove the oil filler cap. • Bring the No. 1 cylinder piston to the top dead center (TDC) on the compression stroke according to the following procedure: • Rotate the crankshaft pulley in the direction of the arrow shown in the illustration until its notch aligns with the “0” scale mark on the timing gear case.



CAUTION • Do not rotate the crankshaft pulley in the direction reverse to the direction indicated in the illustration; doing so could cause damage to the timing chain tensioner at the timing gear train. Should the crankshaft pulley be rotated in the reverse direction, remove the tensioner and reinstall it correctly. • This will place either the No. 1 or No. 4 cylinder piston at TDC on the compression stroke. The No. 1 cylinder piston is at TDC if the camshaft projections visible through the oil filler cap mounting hole are facing upward. Rotate the engine by one full turn to switch the TDCs of the No. 1 and No. 4 cylinder pistons. • Align the notch on the flange plate with the notch on the supply pump gear. • Check that the notch on the flange plate and the notch on the supply pump gear are correctly aligned, and then push the supply pump.



13-66



13 Installation: Fuel pipe • Ensure that the pipe and mounting surfaces of the connector are flat and free from damage. • Bring the pipe into intimate contact with mounting surfaces of the connector evenly, and temporarily tighten it without applying an excessive force. • Tighten it to the specified torque after temporary tightening.



Installation: Fuel hose and clamp • Connect the fuel hose with the supply pump side of it installed all the way to the supply pump. As to the fuel suction pipe side, install it in the illustrated position. Fasten clamps in the illustrated direction.



13-67



COMMON RAIL Disassembly sequence 1 2 3 4 5 6 7



*a::



Injection pipe Fuel pipe Eyebolt Fuel return pipe C Hose Fuel return pipe B Common rail Fuel return hose Non-reusable parts



WARNING • Fuel is highly flammable. Do not handle it near flames or heat. • Spilled fuel may catch fire and therefore, must be wiped off completely.



CAUTION • If dust enters the common rail, the engine performance will be greatly affected. To prevent it, be sure to cover up openings left after pipes and other parts are removed. Also, wash eyebolts, gaskets, etc. in light oil to clear of dirt. • If any abnormality of the common rail is found, replace it.



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Location



Parts to be tightened Injection pipe Fuel pipe



Tightening torque



Remarks



30.4 to 35 {3.1 to 3.6}



–



39 {4.0}



–



Eyebolt (fuel return pipe mounting)



Special tools (Unit: mm) Mark



Tool name and shape



Part No.



Application



Socket wrench A 19



13-68



MH063074



Removal and installation of injection pipe and fuel pipe



13 Removal procedure Removal: Injection pipe and fuel pipe



Installation procedure Installation: Injection pipe and fuel pipe • Ensure that the pipe and mounting surfaces of the connector are flat and free from damage. • Bring the pipe into intimate contact with mounting surfaces of the connector evenly, and temporarily tighten it without applying an excessive force. • After temporary tightening, position the torque wrench on and then tighten them to the specified torque.



Installation: Hose • Install the hose to the fuel return pipe B and fuel return pipe C to the illustrated dimensions.



13-69



INJECTOR



Disassembly sequence 1 2 3 4 5



Snap ring Fuel return hose Injection pipe Bolt (with hexagonal hole) Injector



6 O-ring 7 Nozzle tip gasket



*a:



Fuel return pipe C : Non-reusable parts



WARNING • Fuel is highly flammable. Do not handle it near flames or heat. • Spilled fuel may catch fire and therefore, must be wiped off completely.



CAUTION • When removing the injectors, take care not to strike them with the tool, etc. • To eliminate fuel injection and other problems, protect the injectors and pipes, that have been removed, from the ingress of contaminants. • Before removing the injectors, check injector mounting holes for trapped water and oil. • If any abnormality of the injector is found, replace it.



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • Do not use any wire brush or the similar tools to clean the injection holes of the injectors, or the holes could be crushed. • The injector mounting bolts must always be tightened to the specified torque. Overtightening them could result in a deformed injector and consequently defective fuel injection.



13-70



13 Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Injection pipe Bolt (injector mounting)



Tightening torque



Remarks



30.4 to 35 {3.1 to 3.6}



–



5.2 to 7.2 {0.53 to 0.73}



–



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Lubricant and/or sealant Mark



Points of application O-ring



Installation procedure Installation: Injection pipe • Ensure that the pipe and mounting surfaces of the connector are flat and free from damage. • Bring the pipe into intimate contact with mounting surfaces of the connector evenly, and temporarily tighten it without applying an excessive force. • Tighten it to the specified torque after temporary tightening.



Installation: Fuel return hose • Install the fuel return hose to the fuel return hose C to the illustrated dimension.



13-71



FUEL TANK Removal sequence 1 2 3 4 5 6 7 8 9 10



Drain plug Suction hose Return hose Air vent tube Fuel check valve Fuel level sensor Lock nut Fuel tank band Fuel tank Fuel tank bracket



: Non-reusable parts



Installation sequence Follow the removal sequence in reverse.



DANGER • Do not allow any flames or sources of heat near the fuel tank, as it may explode.



WARNING • To avoid risk of fire, wipe up any spilled fuel. • Insert the air vent tube into fuel tank bracket, while taking care not to pinch or crush with the fuel tank band.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Drain plug Screw (fuel level sensor mounting)



Remarks



19.6 ± 4.9 {2.0 ± 0.5}



–



0.98 to 1.47 {0.10 to 0.15}



–



Bolt (fuel check valve mounting)



4.9 to 8.8 {0.5 to 0.9}



–



Nut (fuel tank band mounting)



3.9 to 7.8 {0.4 to 0.8}



–



Lock nut (fuel tank band mounting)



8.8 to 13.7 {0.9 to 1.4}



–



70 to 90 {7.1 to 9.1}



–



Nut (fuel tank bracket mounting)



13-72



Tightening torque



13 Installation procedure Installation: Fuel check valve • Install the fuel check valve at the illustrated angle.



13-73



FUEL FILTER Disassembly sequence 1 2 3 4 5 6 7 8



Fuel hose Water separator sensor O-ring Case O-ring Filter element Plug Fuel filter head



: Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



WARNING • Fuel is highly flammable. Keep it away from flames and sources of heat. • To avoid risk of fire, wipe up any spilled fuel.



CAUTION • Be careful not to damage the case.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



Water separator sensor



5 ± 1 {0.5 ± 0.1}



–



Case



30 ± 2 {3.1 ± 0.2}



–



Plug



10 ± 2 {1 ± 0.2}



–



Lubricant and/or sealant Mark



Points of application O-ring



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Special tools Mark



Tool name and shape



Filter wrench



13-74



Part No.



MH063203



Application



Removal and installation of case



13 Removal procedure Removal: Case • Loosen the water separator sensor and drain fuel from the case. • Remove the case using .



Installation procedure Installation: Case • Clean the O-ring mounting surface of the fuel filter head and the O-ring groove of the case.



• Replace the filter element and O-ring with new one. • Apply a thin coat of engine oil to the O-ring, and install it on the case and water separator sensor.



CAUTION • Be sure to use only genuine MITSUBISHI FUSO filter elements. The use of non-genuine fuel filters can cause engine failure. • Prevent fine dust particles from entering the fuel filter and fuel pipe, as they can cause problems such as faulty fuel injection.



13-75



FUEL FILTER • Use to tighten the case to the specified torque. • Install the water separator sensor, and then air-bleed the fuel system. • Start the engine, and check that there is no fuel leakage. • Reinstall the fuel filter if there is any leakage.



13-76



13 M E M O



13-77



ACCELERATOR PEDAL Removal sequence 1 Accelerator pedal (See later sections.) 2 Accelerator link (See later sections.)



Installation sequence Follow the removal sequence in reverse.



Removal procedure Removal: Accelerator pedal • Using pliers, pinch the hook of the stopper on the accelerator pedal. Separate the stopper from the pedal while turning the hook by about 15 degrees.



CAUTION • Do not yank on the stopper, as this may damage it.



Installation procedure Installation: Accelerator pedal • Press the accelerator pedal until the accelerator lever touches the accelerator link lever stopper. • Check that the clearance between the stopper and the stopper bolt contact surface of the pedal is as indicated in the illustration. • If the clearance is not within the indicated value range, adjust the stopper bolt and lock it with the nut.



13-78



13 Accelerator Pedal



Disassembly sequence 1 2 3 4 5



E-ring Clevis pin Accelerator pedal Stopper bolt Accelerator pedal bracket



Assembly sequence Follow the disassembly sequence in reverse.



Lubricant and/or sealant Mark



Points of application Accelerator pedal and bracket contact surfaces



Specified lubricant and/or sealant



Quantity



Chassis grease [NLGI No. 1 (Li soap)]



As required



13-79



ACCELERATOR PEDAL Accelerator Linkage



Disassembly sequence 1 2 3 4 5 6 7



Cover Spring Washer Bushing Return spring Accelerator lever Accelerator position sensor and accelerator switch assembly 8 Lever stopper 9 Rubber stopper 10 Accelerator link bracket



Assembly sequence Follow the disassembly sequence in reverse.



NOTE • Perform the inspection and adjustment of the accelerator position sensor. (See “INSPECTION OF ELECTRICAL EQUIPMENT”.)



Lubricant and/or sealant Mark



Points of application Accelerator lever and return spring sliding surface



13-80



Specified lubricant and/or sealant



Quantity



Chassis grease [NLGI No. 1 (Li soap)]



As required



13 M E M O



13-81



INSPECTION OF ELECTRICAL EQUIPMENT #001 Inspection of combination switch AK14A connector connection table Switch position Exhaust brake switch



Terminals with continuity OFF



–



ON



12 - 13



• For other inspections than shown above, see Gr54. • If there is any abnormality, replace the switch. (See Gr37.)



#002 Inspection of starter switch AP2A, AN6A connector connection table Switch position LOCK



Continuity terminal



Without key



–



With key



5–6



ACC



(2)–3, 5–6



ON



(1)–(2)–3, 5–6



START



(1)–(2)–2–3, 5–6



• Terminal numbers within parentheses ( ) show terminals of AP2A. • If any fault is found, replace the switch. (See Gr37.) #157 Inspection of idling speed adjustment potentiometer • Apply 5 volts DC to terminals 1 and 2 of the idling speed adjustment potentiometer. • Turn the knob fully counterclockwise. Then, measure the output voltage across terminals 2 and 3 (see the diagrams on the left) while slowly turning the knob clockwise. • If any measurement is out of specification, replace the idling speed adjustment potentiometer.



Standard value



13-82



Knob position



Output voltage



AUTO (0°)



4.0 ± 0.1 V



SLOW (30°)



3.0 ± 0.1 V



FAST (300°)



1.0 ± 0.1 V



13 #201 Inspection of relay (normally open type 5 pin) • Perform continuity check and operation check, and if any fault is found, replace the relay.



#262 Inspection of water temperature sensor • Place the water temperature sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2. Standard value



20°C



2.45 ± 0.14 kΩ



80°C



0.32 kΩ (reference value)



110°C



147.1 ± 2 Ω



• If either measurement is out of specification, replace the sensor. #263 Inspection of engine speed sensor • Measure the resistance between terminals 1 and 2. Standard value (at 20°C)



860 ± 86 Ω



• If the measurement is out of specification, replace the sensor.



#265 Inspection of vehicle speed sensor • With the 24 volts DC applied to terminals to 1 and 2, slowly turn the shaft of the vehicle speed sensor. • Measure the maximum voltage (high pulse voltage) and minimum voltage (low pulse voltage) occurring at each specified pair of terminals. Terminals



Inspection condition



Standard value



8 pulse output terminals 1(–) to 3(+)



Low pulse voltage



1.5 V or lower



High pulse voltage



23.5 V or more



Low pulse voltage



0.5 V or lower



High pulse voltage



8±1V



25 pulse output terminals 1(–) to 4(+)



• If any measurement is out of specification, replace the sensor.



13-83



INSPECTION OF ELECTRICAL EQUIPMENT #305 Inspection of intake air temperature sensor 1 • Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2. Standard value



0°C



15 +3.78 –2.94 kΩ



20°C



6.514 +1.437 –1.147 kΩ



80°C



0.874 +0.136 –0.115 kΩ



• If either measurement is out of specification, replace the sensor.



#317 Inspection of power take-off load sensor • Apply 5 volts DC to terminals 4 and 6. • Measure the output voltage across terminals 5 and 6 with the lever at idling position A and at full-load position B. Standard value



Lever position



Output voltage



Idling position A



0.85 ± 0.1 V



Full-load position B



3.0 ± 0.1 V



• If measurement of full-load position B deviates from standard value, adjust with full load stopper bolt. • If measurement of idling position A deviates from standard value, replace the sensor.



#318 Inspection of boost pressure sensor • Apply 5 volts DC to terminals 3 and 1. • Apply air pressure. Gradually increase it and, while doing so, measure the output voltage occurring at terminals 2 and 1. Standard value



Air pressure (gauge pressure)



Voltage



99 kPa {1.0 kgf/cm2} 2



232.3 kPa {2.3 kgf/cm }



Approx. 2.5 V Approx. 4.5 V



• If any measurement is out of specification, replace the sensor.



#319 Inspection of common rail pressure sensor • The sensor cannot easily be inspected in isolation, so you must evaluate it indirectly by inspection of system harnesses and related parts. • If there is no abnormality in any related part but the system is abnormal, replace the common rail.



13-84



13 #320 Inspection of cylinder recognition sensor • Measure the resistance between terminals 2 and 3. Standard value



200 to 1,800 Ω



• If the measurement is out of specification, replace the sensor.



#565 Inspection of exhaust shutter 3-way magnetic valve • Perform the following checks. If there is any abnormality, replace the exhaust shutter 3-way magnetic valve. (1) Check of operation • Gradually increase from zero the voltage applied to terminals 1 and 2. • Observe the voltage when the exhaust shutter 3-way magnetic valve operates. (Determine the magnet valve’s OFF-ON operation from the operating sound.) Standard value (min. operating voltage)



22 V or lower



(2) Inspection of air circuit for continuity, air-tightness and reducing valve activation • Pipe the air circuit as shown, and check that when a negative pressure of 93 kPa {700 mmHg} is applied to the IN port to activate M/V1, the vacuum gauge reads 93 kPa {700 mmHg}. Also, check that atmospheric pressure is not let in from the EXH side port. • Check that when M/V2 is activated with a negative pressure of 93 kPa {700 mmHg} applied to the IN port, the vacuum gauge reading is within the specified limit. Standard value Negative pressure: 53.3 ± 1.3 kPa {430 ± 9.8 mmHg}



#574 Inspection of MPROP (rail pressure control valve) • Measure the resistance between terminals 1 and 2. Standard value



2.6 to 3.15 Ω



• If the measurement is out of specification, replace the supply pump.



#582 Inspection of injector magnetic valve • Measure the resistance between terminals 1 and 2. Standard value (at 20°C)



0.255 ± 0.04 Ω



• If the measurement is out of specification, replace the injector.



13-85



INSPECTION OF ELECTRICAL EQUIPMENT #828 Inspection of fuel injection rate adjustment resistor, power take-off resistor and controller area network resistor • Measure the resistance of the resistor number marked on the fuel injection rate adjustment resistor, power take-off resistor and controller area network resistor.



Standard value (at 20°C)



Resistor No.



1



270 ± 13.5 Ω



2



510 ± 25.5 Ω



3



820 ± 41 Ω



4



1,300 ± 65 Ω



5



2,000 ± 100 Ω



6



3,300 ± 165 Ω



7



5,600 ± 280 Ω



8



15,000 ± 750 Ω



9



390 ± 19.5 Ω



10



4,300 ± 215 Ω



11



9,100 ± 455 Ω



12



120 ± 6 Ω (for CAN resistor)



• If the measurement is out of specification, replace the fuel injection rate adjustment resistor, power take-off resistor and controller area network resistor with one that has the same resistor number and same specified resistance.



CAUTION • The fuel injection rate adjustment resistor, power take-off resistor and controller area network resistor are matched to the engine. If you replace them, be sure to replace them with ones that have the same resistor number.



13-86



13 M E M O



13-87



INSTALLED LOCATIONS OF PARTS



13-88



13



13-89



INSTALLED LOCATIONS OF PARTS



13-90



13



13-91



INSTALLED LOCATIONS OF PARTS



13-92



13



13-93



INSTALLED LOCATIONS OF PARTS



13-94



13



13-95



INSTALLED LOCATIONS OF PARTS



13-96



13



13-97



INSTALLED LOCATIONS OF PARTS



13-98



13



13-99



ELECTRIC CIRCUIT DIAGRAM



13-100



13



13-101



ELECTRIC CIRCUIT DIAGRAM



13-102



13



13-103



ELECTRIC CIRCUIT DIAGRAM



13-104



13



13-105



ELECTRIC CIRCUIT DIAGRAM



13-106



13



13-107



GROUP 14 COOLING SPECIFICATIONS ............................................................................. 14-2 STRUCTURE AND OPERATION 1. Cooling System (Flow of Coolant) .............................................. 14-3 2. Thermostat ................................................................................. 14-4 3. Water Pump ................................................................................ 14-4



TROUBLESHOOTING ...................................................................... 14-5 ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspection and Adjustment of Belt Tension ................................ 14-6 2. Inspection of Cracks or Damage of the Belt ................................ 14-8 3. Coolant Replacement and Cleaning of Cooling System .............. 14-9 4. Air Bleeding of Cooling System ..................................................14-11 5. Air/Gas Leakage Test ..................................................................14-11 DISCONNECTION AND CONNECTION OF HOSES AND PIPES .................................................................. 14-12 RADIATOR ...................................................................................... 14-17 COOLING FAN, BELT AND WATER PUMP..................................... 14-18 PRESSURE CAP, THERMOSTAT .................................................... 14-20



14-1



SPECIFICATIONS Item



Specifications



Cooling system



Forced water circulation system



Water pump



Belt-driven involute type



Thermostat



Wax pellet, bottom bypass type (with jiggle valve)



Automatic cooling fan coupling



Continuous control type



Radiator Coolant capacity



14-2



Tube and corrugated fin type dm3 {L}



11.2 {11.2}



STRUCTURE AND OPERATION



14



1. Cooling System (Flow of Coolant)



14-3



STRUCTURE AND OPERATION 2. Thermostat • The thermostat is a bottom bypass type that uses a wax-filled pellet as its flow-regulating element. When the wax is heated, it melts from solid to liquid, changing its total volume. This allows the valve to open or close in accordance with the coolant temperature, regulating and adjusting the flow of coolant to the radiator and to the water pump (bypassing the radiator).



3. Water Pump • The water pump has a drain hole to prevent coolant from entering the unit bearing in case of defect in the unit seal.



14-4



14



TROUBLESHOOTING



Loose or damaged Belt



Water pump



Thermostat



O



Cylinder head Oil cooler



EGR-related items



Excessive coolant loss



O



Oil on belt



O



Incorrectly mounted water pump



O



O



Defective gasket



O



O



Defective unit bearing



O



O



Defective impeller



O



Defective unit seal



O



Fit of unit bearing on flange and impeller too loose



O



Incorrectly mounted case



O



O



Defective gasket



O



O



O O



Valve opening temperature too high (valve remains closed) O Leakage from coolant temperature sensor



Automatic cooling fan coupling



Reference Gr



O



Excessive tension



Valve opening temperature too low (valve remains open)



Radiator



Abnormal noise



Possible causes



Overcooling



Overheating (poor cooling)



Symptoms



O O



O



Clogged core



O



Cracked core and/or separation in welds



O



O



Cracks in upper tank and/or lower tank



O



O



Defective caulking of upper tank and/or lower tank



O



O



Defective packing of upper tank and/or lower tank



O



Defective bearing



O



Damaged bimetal



O



Contaminated bimetal



O



O O O



Silicon oil leakage



O



Incorrectly mounted cylinder head



O



O O



Defective gasket



O



O



Incorrectly mounted oil cooler



O



O



Defective gasket



O



O



Incorrectly mounted EGR cooler bracket



O



O



Incorrectly mounted EGR cooler



O



O



Incorrectly mounted connector



O



O Gr17



Incorrectly mounted adapter



O



O



Damaged O-ring



O



O



Poorly airtight pressure cap



O



Insufficient coolant amount, contaminated coolant



O



Clogged or scaled coolant passage



O



Incorrectly connected hoses



O



O



Incorrectly connected pipes



O



O



Excessively low exterior temperature



Gr11 Gr12



O



*EGR: Exhaust gas recirculation



14-5



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspection and Adjustment of Belt Tension CAUTION • Make sure that there is no oil or grease on the belts. Belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system.



Service standards (Unit: mm) Location



Maintenance item Belt tension



–



Belt tension



When new When reused When new When reused



Standard value



Limit



Remedy



–



Adjust



–



Adjust



14.5 to 16 17 to 19 18 to 21.5 23 to 26



Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened



Tightening torque



Remarks



42.2 {4.3}



–



Nut (tension pulley mounting)



Special tools Mark



Tool name and shape



Belt tension gauge



Part No.



MH062345



Application



Measurement of tension of belt



[Inspection] • Press each belt at a central portion between pulleys with a force of approximately 98 N {10 kgf} as shown in the illustration and measure the amount of deflection of the belt. A: Cooler compressor pulley (for air conditioner) B: Tension pulley (for air conditioner) C: Crankshaft pulley D: Water pump pulley E: Alternator pulley P1, P2: Belt measuring part • Place the small O-ring on at the scale mark corresponding to 98 N {10 kgf} (press force). • Place the large O-ring on at the scale mark corresponding to the maximum permissible deflection value specified for the belt.



14-6



14 • Place at a central portion between pulleys of the belt and push the handle (indicated by the arrow in the illustration) until the O-ring touches the flange.



• Measure the amount of deflection of the belt. • If the measured value deviates from the standard value range, adjust the tension of the belt as follows.



[Adjustment] (1) Belt for fan • Disconnect the negative battery cable from the battery. • Disconnect the alternator B terminal harness from the alternator. • Loosen the alternator mounting bolt, and adjust the tension of the belt by moving the alternator as required. • After the adjustment is completed, retighten the mounting nuts firmly.



CAUTION • Do not adjust the belt with the alternator B terminal harness connected, or the harness will be damaged. • Excessive tension in the belt may damage not only the belt itself but also the bearings of the related components. • When the B terminal harness is connected to the alternator, ensure that it will not interfere with its neighboring equipment. (2) Belt for air conditioner • Loosen the tension pulley mounting nut and adjust the belt tension by turning the adjustment bolt. • After the adjustment is completed, tighten the mounting bolt to the specified torque.



CAUTION • Excessive tension in the belt may damage not only belt itself but also the bearings of the related components.



14-7



ON-VEHICLE INSPECTION AND ADJUSTMENT 2. Inspection of Cracks or Damage of the Belt • Visually check the belts for possible cracks and damage. • If any faults are found, replace the belts. Belt condition



Remaining service life (reference) • The driving distance over the which the belt can still be used is at least as long as that over which the belt has been used since the vehicle was new or since the belt was replaced (whichever is more recent).



• The driving distance over the which the belt can still be used is about half of that over which the belt has been used since the vehicle was new or since the belt was replaced (whichever is more recent).



• The driving distance over the which the belt can still be used is about a quarter of that over which the belt has been used since the vehicle was new or since the belt was replaced (whichever is more recent).



• The belt has reached the end of its service life and must be replaced.



14-8



14 3. Coolant Replacement and Cleaning of Cooling System Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



–



Radiator drain cock



–



Water drain plug



Tightening torque



Remarks



1.5 ± 0.3 {0.15 ± 0.03}



–



29 {3}



–



• Using the radiator for extended periods of time without cleaning can increase chance of rust and scale formation, which may cause engine overheating. The cooling system must be cleaned periodically.



3.1 Draining of coolant • Before draining the radiator, slowly loosen the pressure cap covered with a shop towel or the like and lower pressure in the cooling system while coolant is cool enough. Remember to drain the coolant out of the reservoir tank as well.



WARNING • Opening the pressure cap while the coolant temperature is still high can cause hot coolant to spray out. Cover the pressure cap with a cloth, and loosen it slowly to let the pressure out before opening it fully.



3.2 Cleaning procedure



CAUTION • Water used for flushing the cooling system must be soft water that has a property meeting the requirements indicated below. Use demineralized water in Australia and New Zealand. Using hard water and demineralized water will cause scale and rust to form in the system. Total hardness .......................... 300 ppm or less Sulfate SO 4 .............................. 100 ppm or less Chloride CI ............................. 100 ppm or less Total dissolved solids .............. 500 ppm or less pH .............................................. 6 to 8 • Keep the coolant temperature at approximately 90°C so that the thermostat valve remains open and coolant continues to circulate in the radiator. • For the sake of convenience you can raise the coolant temperature quickly by covering the front of the radiator with corrugated cardboard or something similar. • In cases where a great amount of rust has accumulated it is common for the radiator to leak as a result of cleaning. Conduct a through check for leakage after cleaning.



14-9



ON-VEHICLE INSPECTION AND ADJUSTMENT • Select an appropriate cleaning method according to the condition of the cooling system as shown below. •



Ordinary condition



•



Coolant extremely dirty



•



Radiator clogged



Cleaning using FUSO RADIATOR CLEANER (RADIPET-7). Flushing with water. Drain out coolant. Make water solution of FUSO RADIATOR CLEANER (RADIPET-7) at 5 to 10 % concentration in volume. Remove the pressure cap and pour solution into thermostat cover. Let the engine idle for 30 minutes with the solution at approximately 90°C.



CAUTION •



Limit the engine idling period to one hour. Operating an engine containing the cleaning solution for longer time may lead to damage of the cooling system.



Drain out coolant/cleaning solution. Remove the pressure cap and pour tap water (preferably hot) into the thermostat cover. Let the engine idle for 10 minutes with water at approximately 90°C. Drain out water. Cleaning is complete if drained water is clear. Repeat procedure if drained water is not clear.



CAUTION •



•



After cleaning the cooling system using cleaning solution, fill it with coolant containing the specified additive as soon as possible. To prevent freezing of the coolant and corrosion of the cooling system, use the coolant with the specified ratio of FUSO DIESEL LONGLIFE COOLANT. (See the Owner’s Handbook for instructions on the use of the additive.)



DANGER • If you accidentally splash FUSO DIESEL LONGLIFE COOLANT in your eyes, wash it out immediately with water and seek medical attention.



WARNING • FUSO DIESEL LONGLIFE COOLANT is flammable. Keep it away from heat and flames.



14-10



14 4. Air Bleeding of Cooling System • With the pressure cap removed and the coolant temperature at 90°C, let the engine idle in order to bleed air completely out of the cooling system. • After air bleeding is completed, refill the reservoir tank with coolant as needed.



5. Air/Gas Leakage Test • Presence of air or exhaust gas in coolant accelerates corrosion of the cooling system components. To prevent this, carry out air/ gas leakage tests in accordance with the following procedure. • Remove the pressure cap.



WARNING • If the engine is hot, boiling coolant may spurt out from the filler port when the pressure cap is loosened. To avoid burning yourself, make sure to remove the pressure cap only when the coolant is cold. • Run the engine until the coolant temperature rises to approximately 90°C. • If air bubbles appear continuously through the filler port, there is air or exhaust gas penetrating into the cooling system. • Presence of air in coolant can be an indication of loose cylinder head bolts, loose water pump mounting bolts, loose hose connections, and/or a damaged hose. • Presence of exhaust gas in coolant can be an indication of a damaged cylinder head gasket and/or cracks in the cylinder head.



14-11



DISCONNECTION AND CONNECTION OF HOSES AND PIPES



.



14-12



14



14-13



DISCONNECTION AND CONNECTION OF HOSES AND PIPES



14-14



14 Removal sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15



16 17 18 19 20 21 22 23 24 25 26 27 28 29 30



Upper radiator hose Lower radiator hose Radiator pipe Lower radiator hose Heater hose Heater pipe Heater hose Heater pipe Heater hose Heater hose Heater pipe Heater hose Heater pipe Water hose Water hose



Water hose Water pipe O-ring Water hose Eyebolt Water pipe Eyebolt Connector Water pipe Water hose Eyebolt Water pipe Water hose Eyebolt Water pipe



31 32 33 34 35



*a: *b:



Water hose Water hose Water pipe O-ring Water hose Radiator Thermostat cover



: Non-reusable parts



Installation sequence Follow the removal sequence in reverse.



CAUTION • Keep the O-ring free of engine oil. Engine oil will make the O-ring swell, which may cause leakage. • Install each hose clamp to the angle indicated in the illustration so that sufficient clearance is assured between the hose clamp and its surrounding parts.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



Clamp



1.5 to 2.0 {0.15 to 0.2}



Wet



Clamp



3.0 to 4.5 {0.3 to 0.5}



–



Eyebolt



25 {2.6}



–



Connector



93 {9.3}



–



Lubricant and/or sealant Mark



Points of application Clamp screw threads



O-ring



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Soapy water



As required



Installation procedure Installation: Upper radiator hose • Connect the upper radiator hose with its marking opposed to the buildup of the radiator.



14-15



DISCONNECTION AND CONNECTION OF HOSES AND PIPES Installation: Water hose • Connect the water hose with its marking opposed to the buildup of the adapter.



14-16



14



RADIATOR Removal sequence 1 2 3 4 5 6 7 8



Shroud Support rod Support cushion Upper support Radiator drain cock O-ring Support cushion Radiator (See later section.)



: Non-reusable parts



Installation sequence Follow the removal sequence in reverse. • See the previous section “DISCONNECTING AND CONNECTION OF HOSES AND PIPES” for the correct insertion depth of radiator as well as the correct tightening torque of clamps.



Service standards Location –



Maintenance item Air leakage from radiator (air pressure 147 kPa {1.47 kgf/cm2})



Standard value



Limit



Remedy



0 cm3 {0 mL}



–



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Radiator drain cock Nut (support cushion mounting)



Tightening torque



Remarks



1.5 ± 0.3 {0.15 ± 0.03}



–



12 to 15 {1.2 to 1.5}



–



Inspection procedure Inspection: Air leakage from radiator • Connect a hose and radiator cap tester to the upper tank. • Plug the lower tank and put the entire radiator into a tank filled with water. • Apply a specified air pressure using radiator cap tester, and check for any air leakage. • If air leakage is found, replace the radiator.



14-17



COOLING FAN, BELT AND WATER PUMP



Removal sequence 1 2 3 4



Cooling fan Automatic cooling fan coupling Belt Water pump pulley



5 Water pump 6 O-ring : Non-reusable parts



• The automatic cooling fan coupling and the water pump cannot be disassembled. It must be replaced if defective.



Installation sequence Follow the removal sequence in reverse.



CAUTION • The water pump pulley is driven by two belts. Always replace the two belts simultaneously to ensure that both belts have the same tension. • Make sure that there is no oil or grease on the belts. Belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system. • Keep the O-ring free from engine oil. Engine oil will make the O-ring swell, which may cause leakage.



Lubricant and/or sealant Mark



Points of application O-ring



14-18



Specified lubricant and/or sealant



Quantity



Soapy water



As required



14 Inspection and cleaning procedure Inspection: Automatic cooling fan coupling • Make an inspection of the following points. Replace the automatic cooling fan coupling if defective. Check that: • the hydraulic oil sealed inside the coupling is not leaking; • the coupling does not make any abnormal noise or rotate unevenly due to defects in the inside bearing when rotated manually; and • the automatic cooling fan coupling does not move too much when pushed and pulled in the axial directions when the engine is cold. Cleaning: Automatic cooling fan coupling • When removing foreign matter from the bimetal, be careful not to press too hard against the bimetal.



14-19



PRESSURE CAP, THERMOSTAT Disassembly sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15



Water hose Water hose Water hose Water hose Water hose Water bypass pipe Pressure cap Thermostat cover Thermostat Water temperature sensor (for engine control) Water temperature sensor (for thermometer) Adapter O-ring Thermostat case O-ring



: Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



CAUTION • Keep the O-ring free of engine oil. Engine oil will make the O-ring swell, which may cause leakage.



Service standards (Unit: mm) Location



Maintenance item



7



Pressure cap valve opening pressure



9



Thermostat



Valve opening temperature Valve lift / temperature



Standard value



Limit



Remedy



110 ± 15 kPa {1.1 ± 0.15 kgf/cm2}



–



Replace



82.0 ± 2°C



–



8.5 or more / 95°C



–



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Water temperature sensor (for engine control) Water temperature sensor (for thermometer) Bolt (thermostat case installation)



Tightening torque



Remarks



40 {4.1}



–



19 to 28 {2.0 to 2.9}



–



Lubricant and/or sealant Mark



Points of application O-ring



14-20



Specified lubricant and/or sealant



Quantity



Soapy water



As required



14 Inspection procedure Inspection: Pressure cap (1) Pressure cap valve opening pressure • Replace the pressure cap if the measured value deviates from the standard value range.



(2) Inspection of vent valve • Before starting the inspection, check the level of coolant in the reservoir tank. • Run the engine at full speed. Stop the engine when the level of coolant in the reservoir tank noticeably rises. • Wait until the coolant temperature drop to the ambient temperature. Then, check if the coolant in the reservoir tank has returned to the same level as that confirmed before the engine was started. • If the coolant has failed to return to its original level, the vent valve is defective. In this case, replace the pressure cap.



CAUTION • Be aware of that removing the pressure cap before the coolant cools down to the ambient temperature will result in loss of vacuum in the radiator, which prevents the coolant from being returned to the reservoir tank. Inspection: Thermostat • Stir the water using a stirring rod to maintain an even water temperature in the container, then conduct the tests indicated below. • If the measured values deviate from the standard value ranges, replace the thermostat. (1) Valve opening temperature • Hold the thermostat with wire to keep it away from the heat source. • Heat the water gradually to the valve opening temperature. • Maintain this temperature for five minutes and make sure that the valve is completely open. • Make sure that the valve closes completely when the water temperature drops below 65°C. (2) Valve lift/temperature • Heat the water to 95°C with the valve completely open. Maintain this temperature in this state for five minutes and measure the valve lift.



14-21



PRESSURE CAP, THERMOSTAT Installation procedure Installation: Thermostat • Install the thermostat while aligning the rightmost jiggle valve with the bolt hole in the thermostat case as shown in the illustration.



14-22



GROUP 15 INTAKE AND EXHAUST SPECIFICATIONS ................................. 15-2 STRUCTURE AND OPERATION 1. Air Cleaner ...................................... 15-3 2. Turbocharger ................................... 15-4 3. Turbocharger Control System ......... 15-5 4. Exhaust Shutter ............................ 15-10 5. Diesel Particulate Filter Regeneration Control System .............................. 15-12



TROUBLESHOOTING ........................ 15-21 ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Measurement and Adjustment of Turbocharger Boost Pressure ....... 15-22 2. Cleaning and Inspection of Air Cleaner Element ...................... 15-28 3. Check for Looseness in Intake Manifold Mounting Bolts and Nuts ....................................... 15-28 4. Check for Cracks and Gas Leakage in Exhaust Manifold ...................... 15-29 5. Check for Cracks and Gas Leakage in Turbocharger ............................ 15-29 6. Loose Turbocharger ....................... 15-29 7. Inspection of Diesel Particulate Filter Unit for Clogging and Cleaning of the Diesel Particulate Filter Unit .......... 15-30 8. Inspection of Exhaust Gas ............. 15-36 9. Initialization of the DPF-Related Information .................................... 15-37



TURBOCHARGER CONTROL SYSTEM 1. Diagnosis Procedure ...................... 15-40 2. Diagnostic Precautions ................. 15-40 3. Inspections Based on Diagnosis Codes ........................................... 15-41 4. Multi-Use Tester Service Data ........ 15-45



5. Actuator Tests Performed Using Multi-Use Tester ............................ 15-45 6. Inspections Performed at Electronic Control Unit Connectors ................ 15-46 7. Inspection of Electrical Equipment ..................................... 15-47 8. Installed Locations of Parts ............ 15-48 9. Electric Circuit Diagram.................. 15-53



DIESEL PARTICULATE FILTER REGENERATION SYSTEM 1. Diagnosis Procedure ...................... 15-56 2. Diagnostic Precautions ................. 15-56 3. Inspections Based on Diagnosis Codes ........................................... 15-57 4. Multi-Use Tester Service Data ........ 15-69 5. Actuator Tests Performed Using Multi-Use Tester ............................ 15-69 6. Inspections Performed at Electronic Control Unit Connectors ................ 15-70 7. Inspection of Electrical Equipment ..................................... 15-72 8. Installed Locations of Parts ........... 15-75 9. Electric Circuit Diagram.................. 15-81



AIR DUCT AND AIR CLEANER ......... 15-86 TURBOCHARGER .............................. 15-90 INTERCOOLER ................................... 15-96 INTAKE MANIFOLD .......................... 15-100 EXHAUST MANIFOLD ...................... 15-102 EXHAUST PIPE ................................. 15-104 DIESEL PARTICULATE FILTER ....... 15-110 REAR OXIDATION CATALYST ......... 15-114



15-1



SPECIFICATIONS /



Item



Specifications



Air cleaner element type



Filter paper type Model



Turbocharger



Manufacturer Cooling system



Intercooler type Diesel Particulate Filter type



15-2



TD 04 MITSUBISHI HEAVY INDUSTRIES Water-cooled Tube and corrugated fin air cooled type Regeneration control type diesel particulate filter system



STRUCTURE AND OPERATION



15



1. Air Cleaner • The air cleaner is a single element type. • When the engine slows down below the predetermined speed, the level of vacuum in the air cleaner changes and causes the unloader valve to vibrate. Vibration of the unloader valve allows the air cleaner to automatically discharge any water and dust that has accumulated inside.



15-3



STRUCTURE AND OPERATION 2. Turbocharger



• TD04 model is equipped with turbocharger, which is a variable nozzle vane type turbocharger with adjustable, heat-resistive alloy turbine vanes provided at the turbine exhaust gas inlet port.



15-4



15 3. Turbocharger Control System 3.1 General description • In the turbocharger control system, various engine-related information (engine speed, coolant temperature, accelerator position) and driving status are collected by the relevant sensors and are sent to the engine electronic control unit and turbocharger electronic drive unit which then control the engine based on the information received. • The turbocharger actuator controls the opening of turbine vanes according to control signals to ensure low fuel consumption and high torque operation over the entire speed range.



15-5



STRUCTURE AND OPERATION 3.2 Electronic control system (1) System block diagram



Part



Main function/operation



Engine speed sensor



Sensing of engine speed



Cylinder recognition sensor



Cylinder recognition



Water temperature sensor



Sensing of coolant temperature



Boost pressure sensor



Sensing of boost pressure



Accelerator pedal position sensor



Sensing of extent of accelerator pedal depression



Engine warning lamp



Indication of system abnormalities



EDU relay



Switching ON/OFF supply of power to exhaust gas recirculation electronic drive unit, throttle and turbocharger electronic drive unit



CAN communication (Turbocharger EDU)



Engine data recognized by the engine electronic control unit are outputted to the CAN bus to turbocharger systems to obtain data that they need for control. Turbocharger electronic drive unit issues signals to the engine electronic control unit via the CAN bus to enable it to effect engine control appropriate for each type of system control.



15-6



15 (2) Turbocharger control function • In response to output data from various sensors, the engine electronic control unit determines the opening of turbine vanes as required by the engine operating status and sends necessary control signals to the turbocharger electronic drive unit. (Target opening of turbine vanes.) • The turbocharger electronic drive unit activates the turbocharger actuator motor to detect the amount of resultant shaft position by means of the position sensor and sends it to the engine electronic control unit. (Actual opening of turbine vanes.) Thus, the target opening of turbine vanes can be accurately maintained as commanded by the engine electronic control unit. (2.1) Turbocharger actuator • In response to command signals from the turbocharger electronic drive unit, the turbocharger actuator moves the shaft up and down by means of its DC motor to open and close the turbine vanes.



(3) Fault diagnosis function • The engine electronic control unit continuously monitors the electronic drive units and sensors for faults. In the event that the engine electronic control unit finds a component faulty, it causes an indication to be made in the meter cluster to alert the driver. At the same time, it memorizes the fault location in the form of a diagnosis code and starts a control during fault. • While the engine is running, the turbocharger electronic drive unit continuously monitor communication with the position sensor and motor of the turbocharger actuator communication with the engine electronic control unit. In the event that they identify a fault, they send fault data to the engine electronic control unit. • While control necessitated by a fault is taking place, the system’s functionality is limited to ensure vehicle and driver safety. It is possible to read the memorized diagnosis code using a Multi-Use Tester or from flashing of the warning lamp. • The control during fault recovers by servicing the faults. However, for some diagnosis codes, the warning lamp stays illuminated until the normal signals are input for several times. • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • The Multi-Use Tester is capable of showing more detailed diagnosis codes.



15-7



STRUCTURE AND OPERATION 3.3 Electronic control unit wiring diagram



15-8



15 M E M O



15-9



STRUCTURE AND OPERATION 4. Exhaust Shutter 4.1 Overview • The exhaust shutter is used for controlling the diesel particulate filter regeneration and facilitating the warming up of the exhaust brake.



4.2 Operation



• The butterfly valve operates in interlocking with the lever movement. (1) When the butterfly valve is fully opened (exhaust shutter is not operating) • The spring in the power chamber is acting in the direction where the butterfly valve is forced open since no negative pressure is supplied from the vacuum tank. (2) When the butterfly valve is half closed • The negative pressure having passed through the pressure reducing valve compresses the spring in the power chamber, which causes the butterfly valve to move in the closing direction and the piston end to be pressed against the stopper bolt. At this time, however, the butterfly valve is not brought in its fully closed position because the force of the spring attached to the lever exceeds the reduced negative pressure. (3) When the butterfly valve is fully closed • The negative pressure is directly applied to the power chamber and compresses the spring in the power chamber, which causes the butterfly valve to move in the closing direction and the piston end to be pressed against the stopper bolt. At this time, the negative pressure is higher and therefore compresses the spring attached to the lever farther, which allows the butterfly valve to move to the fully closed position.



15-10



15 4.3 Control • The exhaust shutter opens/closes the butterfly valve by the signal from the engine electronic control unit. (1) Operation (1.1) When the butterfly valve is fully opened (exhaust shutter is not operating) • As there is no signal from the engine electronic control unit, the exhaust shutter 3-way magnetic valve 1 and 2 are not activated and the butterfly valve is kept open.



(1.2) When the butterfly valve is half closed • By the ON signal from the engine electronic control unit, the exhaust shutter 3-way magnetic valve 2 is activated. • The negative pressure from the vacuum tank is reduced by the pressure reducing valve, and the reduced pressure is applied to the power chamber. Therefore, the butterfly valve is half closed.



15-11



STRUCTURE AND OPERATION (1.3) When the butterfly valve is fully closed • By the ON signal from the engine electronic control unit, the exhaust shutter 3-way magnetic valve 1 is activated. • The negative pressure from the vacuum tank is applied to the power chamber and the butterfly valve is fully closed.



5. Diesel Particulate Filter Regeneration Control System 5.1 Overview • The diesel particulate filter regeneration control system burns and removes the particulate matter (PM) in the ceramic filter using high temperature exhaust gas to prevent excessive accumulation of particulate matter in the ceramic filter. Thus the diesel particulate filter is regenerated. • The regeneration is divided into two types. One is the continuous regeneration utilizing high temperature exhaust gas during high-speed or high-load operations. The other is the automatic or parked regeneration which uses high temperature exhaust gas created by the regeneration control by the engine electronic control unit. • For automatic or parked regeneration, the engine electronic control unit estimates the accumulated amount of particulate matter from the vehicle operating hours, driving distance and the engine condition during driving, and the regeneration is performed by controlling the fuel injection (amount and timing), turbocharger, exhaust shutter and intake throttle to make high temperature exhaust gas.



15-12



15 5.2 Structure



15-13



STRUCTURE AND OPERATION 5.3 Diesel particulate filter, rear oxidation catalyst • Diesel particulate filter unit consists of the front oxidation catalyst, ceramic filter, and rear oxidation catalyst attached at the rear end.



(1) Front oxidation catalyst • In normal driving condition, unburnt fuel and part of the particulate matter in the exhaust gas from the engine is purified by this catalyst. • During filter regeneration, the unburnt fuel supplied by the post injection is oxidized by the front oxidation catalyst, and the oxidation heat raises exhaust gas temperature.



(2) Ceramic filter • The ceramic filter is an aggregate of thin tubes, and these tubes are closed at either end alternatively. During normal operation, particulate matter is trapped when the exhaust gas enters a tube and passes through the wall of the tube (filter section) to the adjacent tube. • During regeneration, the particulate matter accumulated in the filter is cleared by burning at high temperature. This, however, cannot remove the calcium (ash) contained in the engine oil and the ash will accumulate in the filter. The excessively accumulated ash may cause early clogging of the ceramic filter. Therefore, the ceramic filter must be cleaned periodically. (3) Rear oxidation catalyst • The rear oxidation catalyst oxidize and remove the components (HC and CO) which remain untreated through the diesel particulate filter.



15-14



15 5.4 Electronic control system (1) System block diagram



15-15



STRUCTURE AND OPERATION Part Accelerator pedal position sensor



Main function/operation Detection of extent of accelerator pedal depression



Engine speed sensor



Detection of engine speed



Cylinder recognition sensor



Cylinder recognition



Water temperature sensor



Detection of coolant temperature



Common rail pressure sensor



Sensing of common rail pressure



Air flow sensor



Sensing of intake air flow rate



DPF absolute pressure sensor



Detection of DPF absolute pressure



DPF differential pressure sensor



Detection of DPF filter differential pressure



Exhaust gas temperature sensor 1



Detection of ceramic filter inlet temperature



Exhaust gas temperature sensor 2



Detection of ceramic filter outlet temperature



Catalytic temperature sensor



Detection of front catalyst inlet temperature



Intake air temperature sensor 1



Detection of upper stream side intake air temperature (in the intercooler)



Intake air temperature sensor 2



Detection of downstream side intake air temperature (after joining the exhaust gas recirculation)



Boost pressure sensor



Sensing of boost pressure



DPF cleaning switch



ON/OFF changeover of DPF parked regeneration



Parking signal relay (parking brake switch)



Detection of parking condition (turns ON when the parking brake is applied)



Vehicle speed sensor



Sensing of vehicle speed



Injector



DPF regeneration fuel injection control



MPROP (rail pressure control valve)



Control of fuel injection pressure



DPF indicator lamp



Illuminates when the particulate matter accumulation in the DPF exceeds a certain value.



Engine warning lamp



Indication of system abnormalities Illuminates when the particulate matter accumulation in the DPF ceramic filter.



Exhaust shutter 3-way magnetic valve 1, 2



ON/OFF control of exhaust shutter valve



EDU relay



Switching ON/OFF supply of power to EGR EDU, turbocharger EDU and throttle EDU



INOMAT-II ECU



Transmission neutral signal



Sensing of transmission neutral (N range)



Engine speed signal



Output of engine speed for INOMAT-II electronic control unit



Accelerator position signal



Output of extent of accelerator pedal for INOMAT-II electronic control unit



Controller area network communication (INOMAT-II electronic control unit)



• Engine data recognized by the engine electronic control unit are outputted to the controller area network bus to system to obtain data that they need for control. • INOMAT-II electronic control unit issues signals to the engine electronic control unit to enable it to effect engine control appropriate to control of the system.



Controller area network communication (turbocharger EDU, throttle EDU and EGR EDU)



• Engine data recognized by the engine electronic control unit are outputted to the controller area network bus to enable systems to obtain data that they need for control. • Each EDU opens/closes the valves to increase exhaust gas temperature for DPF regeneration.



DPF: Diesel particulate filter EDU: Electronic drive unit EGR: Exhaust gas recirculation ECU: Electronic control unit INOMAT-II: Intelligent and innovative mechanical automatic transmission-II



15-16



15 (2) Diesel particulate filter regeneration control



• The above diagram shows the relations between the driving distance or hours and the particulate matter accumulation amount, and the range of each diesel particulate filter regeneration operation. • The particulate matter accumulation amount increases as the driving distance or hours increase. However, by conducting the regeneration operation that matches the vehicle operating condition and the particulate matter accumulation amount, the particulate matter accumulation amount is reduced to keep the performance of the diesel particulate filter. • The regeneration is divided into two types – the continuous regeneration utilizing exhaust gas during normal driving operation and the automatic or parked regeneration which uses exhaust gas created by the regeneration control. (2.1) Continuous regeneration • When exhaust gas temperature is high during high-speed or high-load operation, NO2 created by the action of the front oxidation catalyst continuously burns the particulate matter accumulated in the ceramic filter. (2.2) Regeneration control Automatic regeneration • When the particulate matter accumulation level is between A and B on the diagram, the engine electronic control unit decides the regeneration period and the automatic regeneration will be performed at an appropriate period. During regeneration, the unburnt fuel (HC) supplied by the post injection is oxidized by the front oxidation catalyst, and the oxidation heat from that reaction burns the particulate matter accumulated in the ceramic filter. Parked regeneration • If the particulate matter (PM) deposit exceeds the level B, it becomes impossible to cease the combustion removal of particulate matters by means of automatic regeneration. The diesel particulate filter indicator lamp will blink if such a condition is encountered to alert the driver of the need to perform the parked regeneration. The parked regeneration is performed when the diesel particulate filter cleaning switch is turned on with all of the following requirements satisfied. • Engine has warmed up (coolant temperature: 70°C or higher) On vehicles with idling speed adjusting potentiometer, its knob must be set to “AUTO” position. • Accelerator pedal released (accelerator pedal position sensor: 0%) • Parking brake applied (parking brake switch: ON) • Gearshift lever placed in N position. • Power take-off inactive (power take-off switch: OFF) • During regeneration, the diesel particulate filter indicator lamp blinks in two intervals (slow and fast) in accordance with the particulate matter accumulation amount. • The exhaust gas temperature increase procedure and the particulate matter burning procedure are the same as that for the automatic regeneration.



15-17



STRUCTURE AND OPERATION Restriction on drive conditions • When the particulate matter accumulation level exceeds C on the diagram, the engine warning lamp illuminates and some restrictions are applied to the driving conditions. • Under this restriction, parked regeneration will not take place even if the diesel particulate filter cleaning switch is turned on. (3) Resetting the DPF-related information (ECU reset function) • Resetting the DPF-related information is performed to make the particulate matter (PM) deposit recognized by the engine electronic control unit coincide with the actual particulate matter (PM) deposit accumulated in diesel particulate filter after replacing or cleaning diesel particulate filter. • The DPF-related information is memorized by the engine electronic control unit as historical records for alerting the driver of the need to make the diesel particulate filter regeneration. (For the method for resetting the DPF-related information, see “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) (4) Particulate matter (PM) deposit verification function • The particulate matter (PM) deposit verification function allows the driver to recognize the current particulate matter (PM) deposit through the number of flashing times of diesel particulate filter indicator. This function is activated while the diesel particulate filter cleaning switch is kept pressed with the starter switch placed in the “ON” position (without starting the engine). • Periodical use of this function will give the operator a yardstick for the parked regeneration of the diesel particulate filter, which is helpful for preventing system failures caused by clogged or broken diesel particulate filter resulting from excessive particulate matter (PM) deposit. • The relationship between the diesel particulate filter indicator flashing pattern and the particulate matter (PM) deposit is as shown below: DPF indicator flashing pattern



Particulate matter (PM) deposit



Flashing once



Very small



Availability of DPF regeneration • DPF parked regeneration not allowed



Flashing twice



Small



Flashing 3 times



Medium



• DPF automatic regeneration performed • DPF parked regeneration allowed



Large



• DPF automatic regeneration not performed • DPF parked regeneration allowed



Flashing 4 times



Illumination



Very large



• DPF regeneration prohibited (regeneration by MultiUse Tester allowed)



Remarks – DPF automatic regeneration soon started –



DPF indicator blinking during driving



While DPF cleaning switch is being pressed (5) Fault diagnosis function • The engine electronic control unit continuously monitors the electronic drive units and sensors for faults. In the event that the engine electronic control unit finds a component faulty, it causes an indication to be made in the meter cluster to alert the driver. At the same time, it memorizes the fault location in the form of a diagnosis code and starts a control during fault. • While control necessitated by a fault is taking place, the system’s functionality is limited to ensure vehicle and driver safety. It is possible to read the memorized diagnosis code using a Multi-Use Tester or from flashing of the warning lamp.



ECU: Electronic control unit DPF: Diesel particulate filter



15-18



15 5.5 Electronic control unit wiring diagram



15-19



STRUCTURE AND OPERATION



15-20



15



Carbon deposits on shaft and turbine wheel



O



O



Interference between shaft and turbine wheel and turbine housing



O



O



O



Cartridge assembly



Shaft and turbine wheel bend



O



O



O



Turbocharger



Shaft and turbine wheel broken



O



O



O



Interference between compressor wheel and compressor cover



O



O



O



Compressor wheel broken



O



O



O



Faulty sliding inside each part due to clogged lubricating oil pipe and eyebolt



O



O



O



O



Compressor cover improperly mounted Turbine housing improperly mounted



O



O



Foreign substances deposited on intercooler front core



Throttle actuator



O



O



O



O



Butterfly valve malfunction



O



O



O



Gr17



Front pipe/tail pipe deformed



O



Front pipe/tail pipe fitted poorly



O O



O O



O



Insufficient vacuum



O



O



Piping crushed and restricted



O



O



3-way magnetic valve faulty



O



O



O



O



Stuck valve shaft



O



O



Defective power chamber



O



Vacuum system Exhaust shutter



O



O



O



Butterfly valve does not open



Diesel Ceramic filter clogged particulate filter Diesel particulate filter broken



O



Electric system



Defective butterfly valve



Incorrect valve clearances



O



Head gasket defective



O



Wear/carbon deposits on valves and valve seats



O



Valve spring weakened



O



O O



O



O



O



O



O



Piston ring grooves worn/damaged



O



O



O



O



Engine oil quantity excessive



Gr13



Gr11



Piston rings worn/damaged Cooling system malfunctioning



Reference Gr



O



Turbocharger actuator malfunctioning Intercooler



Conditions for diesel particulate filter regeneration not met



O



Engine output inconsistent



O



Exhaust brake not released



Defective bearing



Exhaust brake does not work



O



Poor engine power



Black exhaust gas O



Clogged air cleaner element



White exhaust gas



Engine hard to start O



Possible causes Air cleaner



Excess oil consumption



Symptoms



Abnormal noise or vibration in intake/ exhaust system



TROUBLESHOOTING



Gr14 O



Gr12



Major moving parts seized



O



Gr11



Uneven or excessive fuel injection



O



Gr13



Exhaust gas temperature sensor open-circuited or intermittent connection



O



15-21



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Measurement and Adjustment of Turbocharger Boost Pressure CAUTION • If boost pressure exceeds the standard value, the engine may malfunction or break down. Boost pressure must be within the specified range.



Service standards Location –



Maintenance item Boost pressure



Standard value



Limit



Remedy



120 ± 2 kPa



–



Inspect or adjust



Special tools Mark



Tool name and shape



Spanner



Part No.



MH063019



Application



Removal and installation of lock nut



1.1 Preparation • Remove the safety plug from the high voltage battery box while referring to Gr18 HEV System. (Be sure to observe the regulations of your country or region regarding the qualifications or trainings required for servicing the high-voltage equipment.) • Shift the transmission to neutral. • Hold the steering wheel in neutral position. • Turn off lamps and accessory devices not to increase the engine speed. • Connect the Multi-Use Tester. (See Gr00.) • If any fault exists (corresponding diagnosis code is issued), rectify it.



1.2 Measurement and correction of boost pressure • Warm up the engine until the engine coolant has been heated to more than 70°C. (Determine coolant temperature from service data [13: Water temperature].) • Check that the non-load minimum speed (idling speed) is as specified. (See Gr13.) • Select [A5: VGT1] in [Actuator Test] of the Multi-Use Tester. Set [Target Value] to 70% and execute. • When [A5: VGT1] is executed, the engine speed should be automatically increased to 2000 rpm. • Maintain the state of [Target Value] having been executed (10 minutes or more) until boost pressure is stabilized. • Measure the following items from among [Service Data]. 0C: Boost pressure (measured boost pressure) 15: Atmospheric pressure (measured atmospheric pressure) • Measure the intake air temperature (ambient temperature around the vehicle) using a thermometer. • Obtain boost pressure correction value respectively by calculating above Service Data. [Calculation of intake air temperature correction value] • Intake air temperature correction value = –0.12 (Measured boost temperature –25) [Calculation of atmospheric pressure correction value] • Atmospheric pressure correction value = Measured atmospheric pressure –100 [Calculation of boost pressure correction value] • Boost pressure correction value = Measured boost pressure – intake air temperature correction value – atmospheric pressure correction value • If boost pressure correction value deviates from the standard value, adjust the turbocharger.



WARNING • The turbocharger is hot for a while after the engine is stopped. Take care not to burn yourself during adjustment work.



15-22



15 1.3 Turbocharger adjustment • Adjust the turbocharger using the flowchart shown below.



Check of whether control crank and position bolt are in contact



(1) When control crank and position bolt are in contact (normal condition)



(1.1) Adjustment of position bolt length



(1.2) Adjustment of turbocharger actuator shaft length



(2) When control crank and position bolt are not in contact



(2.1) Adjustment of turbocharger actuator shaft length (2.2) Measurement of boost pressure



NG



OK (1.3) Measurement of boost pressure



NG



(2.3) Adjustment of position bolt length



OK (2.4) Adjustment of turbocharger actuator shaft length



(2.5) Measurement of boost pressure



NG



OK (1.4) Replacement of turbocharger



Adjustment complete



(2.6) Replacement of turbocharger



Adjustment complete



Adjustment must be performed only when diagnosis code P2263 is generated or when the control crank does not contact the position bolt.



15-23



ON-VEHICLE INSPECTION AND ADJUSTMENT [Inspection] • Check whether the control crank comes into contact with the position bolt in accordance with the procedure described below. • Place the starter switch in the “ON” position, and check to confirm that the turbocharger actuator shaft moves once to the full stroke position. At this time, put a thin paper between the control crank and position bolt to check for contact condition between them. • If they are in contact, make adjustments in accordance with the procedures described in (1) below. If not, make adjustments in accordance with the procedures described in (2) below.



[Adjustment] (1) When control crank and position bolt are in contact (normal condition) (1.1) Adjustment of position bolt length • Place the starter switch in the “LOCK” position or remove the starter key. • Loosen the lock nut at . • Provide alignment markings on the position bolt and turbocharger actuator unit with a pen or the like as shown in the illustration. • Insert a hex wrench into the position bolt as shown and turn the bolt with it to adjust the boost pressure to the standard value. • To increase boost pressure: Turn the position bolt clockwise (loosening direction). • To decrease boost pressure: Turn the position bolt counterclockwise (tightening direction). • Change in pressure: An increase of approximately 3 kPa per turn of the position bolt (with the measurement of boost pressure) • After adjustment, tighten the lock nut of position bolt.



15-24



15 (1.2) Adjustment of turbocharger actuator shaft length • This adjustment must be performed only when diagnosis code P2263 is generated or when the control crank does not contact the position bolt. • Place the starter switch in the “LOCK” position or remove the starter key. • Provide alignment markings on the lock nut of turbocharger actuator and joint with a pen or the like as shown in the illustration. • Remove the snap ring and pin from the turbocharger actuator. • Loosen the lock nut and turn the joint to extend the shaft. • Guide to adjustment: The shaft length must be changed only by the same amount as the position bolt adjustment made in the paragraph “(1.1) Adjustment of position bolt length”. (The amount of the turbocharger actuator stroke must not be changed.) The shaft length will change 1 mm by each one turn of the joint. • The shaft length shall be considered normal if diagnosis code P2263 is not generated and the contact between the control crank and position bolt is observed even if it has not been adjusted by the same amount as for the position bolt. • After adjustment, fit the snap ring and pin onto the turbocharger actuator, and tighten the lock nut.



CAUTION • If the shaft of the turbocharger actuator deviates from the standard stroke range (19 to 23 mm), the engine electronic control unit judges the condition as an adjustment error, generating the diagnosis code “P2263: VGT System” and displaying the engine warning (amber). If such indications are given, adjust the shaft length such that the shaft is shortened by the length equivalent to half a turn of the shaft. If the stroke is still out of the standard value range, check the turbocharger. (1.3) Measurement of boost pressure • For measurement of the boost pressure, see “1.2 Measurement and correction of boost pressure.” (1.4) Replacement of turbocharger • For replacement of the turbocharger, see “TURBOCHARGER.”



15-25



ON-VEHICLE INSPECTION AND ADJUSTMENT (2) When the control crank does not come into contact with the position bolt (2.1) Adjustment of turbocharger actuator shaft length • Place the starter switch in the “LOCK” position or remove the starter key. • Put an alignment mark on the lock nut and the joint of the turbocharger actuator with a pen or the like as shown in the illustration. • Remove the snap ring and the pin on the turbocharger actuator side. • Loosen the lock nut and turn the joint section. Place the starter switch in the “ON” position. Pull out the turbocharger actuator shaft to the length in which the control crank will contact the position bolt when the shaft is extended temporarily to its full stroke position. Guide to adjustment: The shaft length will change 1 mm by each one turn of the joint. • Replace the lever and pin with new ones if the correct contact is not achieved even when the shaft is pulled out to the limit. • Upon completing the shaft adjustment, install the snap ring and the pin on the turbocharger actuator side and tighten the lock nut.



CAUTION • If the amount of the stroke of the turbocharger actuator shaft is out of the standard value range (19 to 23 mm), the engine electronic control unit judges the condition as an adjustment error, generating the diagnosis code “P2263: VGT system error” and displaying the engine warning (amber). If the stroke deviates from the standard value, inspect the turbocharger. (2.2) Measurement of boost pressure • For measurement and of boost pressure, see “1.2 Measurement and correction of boost pressure”. (2.3) Adjustment of the position bolt length • This adjustment should be performed only when the boost pressure is not within the standard value range. • Put an alignment mark on the position bolt and the turbocharger actuator body using a pen or the like as shown in the illustration. • Loosen the lock nut of the position bolt using . • Fit a hex wrench onto the position bolt as shown in the illustration and turn the bolt such that the measured boost pressure meets the standard value. • To increase the boost pressure: Turn the position bolt clockwise as shown in the illustration. • To decrease the boost pressure: Turn the position bolt counterclockwise as shown in the illustration. • Guide to adjustment: The boost pressure will change approximately 3 kPa each time the position bolt is turned one turn (when taking measurements of boost pressure). • After adjustment, secure the lock nut with .



15-26



15 (2.4) Adjustment of turbocharger actuator shaft length • This adjustment must be performed only when diagnosis code P2263 is generated or when the control crank does not contact the position bolt. • Place the starter switch in the “LOCK” position or remove the starter key. • Provide alignment markings on the lock nut of turbocharger actuator and joint with a pen or the like as shown in the illustration. • Remove the snap ring and pin from the turbocharger actuator. • Loosen the lock nut and turn the joint to extend the shaft. • Guide to adjustment: The shaft length must be changed only by the same amount as the position bolt adjustment made in the paragraph “(1.1) Adjustment of position bolt length”. (The amount of the turbocharger actuator stroke must not be changed.) The shaft length will change 1 mm by each one turn of the joint. • The shaft length shall be considered normal if diagnosis code P2263 is not generated and the contact between the control crank and position bolt is observed even if it has not been adjusted by the same amount as for the position bolt. • After adjustment, fit the snap ring and pin onto the turbocharger actuator, and tighten the lock nut.



CAUTION • If the shaft of the turbocharger actuator deviates from the standard stroke range (19 to 23 mm), the engine electronic control unit judges the condition as an adjustment error, generating the diagnosis code “P2263: VGT System” and displaying the engine warning (amber). If such indications are given, adjust the shaft length such that the shaft is shortened by the length equivalent to half a turn of the shaft. If the stroke is still out of the standard value range, check the turbocharger. (2.5) Measurement of boost pressure • For measurement of the boost pressure, see “1.2 Measurement and correction of boost pressure.” (2.6) Replacement of turbocharger • For replacement of the turbocharger, see “TURBOCHARGER.”



15-27



ON-VEHICLE INSPECTION AND ADJUSTMENT 2. Cleaning and Inspection of Air Cleaner Element [Cleaning] • Blow a jet of compressed air at a pressure not higher than 685 kPa {7 kgf/cm2} against the inside surfaces of the element. • Move the compressed air jet up and down along all pleats of the filter paper element.



CAUTION • For the frequency and timing of cleaning, see the relevant instruction manual. More frequent cleaning than necessary may damage the element, causing dust and foreign matter to be sucked into the engine. • Do not strike the element or hit it against another object to remove dust. • Do not blow compressed air against outside surfaces of the element. [Inspection] • Shine some electric light inside the element. • Replace the element if thin spots or broken parts are evident in the filter paper, or if the packing at the top of the element is damaged. Also replace the element if the dust on the element is damp with oily smoke or soot, regardless of the replacement schedule.



[Installation] • Install the covers while aligning their respective “ each other as shown in the illustration.



” marks with



3. Check for Looseness in Intake Manifold Mounting Bolts and Nuts • Check for looseness in the intake manifold and air inlet pipe mounting bolts and nuts. If there is looseness, tighten the bolts and nuts to the specified torque. (See “INTAKE MANIFOLD”.)



15-28



15 4. Check for Cracks and Gas Leakage in Exhaust Manifold • Inspect the exhaust manifold visually. If there is any trace of gas leakage or cracks, replace the exhaust manifold. (See “EXHAUST MANIFOLD”.) • Check for looseness in the exhaust manifold mounting nuts. If there is looseness, tighten the nuts to the specified torque. (See “EXHAUST MANIFOLD”.)



5. Check for Cracks and Gas Leakage in Turbocharger • Inspect the turbocharger visually. If there is any trace of gas leakage or cracks, replace the turbocharger. (See “TURBOCHARGER”.) • Check for looseness in the turbocharger mounting bolts and nuts. If there is looseness, tighten the bolts and nuts to the specified torque. (See “TURBOCHARGER”.)



6. Loose Turbocharger • Remove the bolts, loosen the clamp securing the air hose and turbocharger and remove the air hose.



• Turn the compressor wheel by turning the shaft tip with fingers. Check that the compressor wheel rotate smoothly without touching the compressor. • If any abnormality is found, disassemble and inspect the turbocharger. (See “TURBOCHARGER”.)



15-29



ON-VEHICLE INSPECTION AND ADJUSTMENT 7. Inspection of Diesel Particulate Filter Unit for Clogging and Cleaning of the Diesel Particulate Filter Unit • These works should be performed at 12-month intervals as follows:



CAUTION • Diesel particulate filter has become very hot after the operation of engine. Cool down the diesel particulate filter sufficiently so as not to get burnt. • The ceramic filter must be cleaned every 3 years or every 150,000 km running after installing (replacement with) a new filter. Sustained use without cleaning can cause ashes to accumulate, possibly resulting in broken ceramic filter.



Service standards Location



Maintenance item



Standard value



Limit



Remedy



–



Diesel particulate filter differential pressure (between before and after regeneration, cleaning, no-load operation at maximum speed)



Less than 7.5 kPa



7.5 kPa or more



Replace



Special tools (Unit: mm) Mark



Tool name and shape



Diesel particulate filter cleaning equipment



Part No.



MH063817



Application



Cleaning of ceramic filter



7.1 Preparation • • • • • •



Place the transmission in neutral. Turn the steering wheel in neutral position and securely apply the parking brake. Turn off lamps and accessory devices not to increase the engine speed. Connect the Multi-Use Tester. (See Gr00.) Check diagnosis code of each electronic control system. If any fault exists, rectify it. Warm up the engine until the engine coolant has been heated to more than 70°C. (Check by Multi-Use Tester service data “13: Water Temperature”.)



15-30



15 7.2 Inspection procedure • Perform inspection following the flowchart shown below.



CAUTION • The pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter may exceed 20 kPa due to clogging of the ceramic filter or other reasons. If diesel particulate filter regeneration is conducted using the actuator test “DPF Regeneration” of the Multi-Use Tester in this condition, soot in the filter would burn abnormally, heating and possibly damaging the filter. Be sure to measure the pressures to make sure that the difference is smaller than 20 kPa before conducting diesel particulate filter regeneration. • Follow this flowchart until the end. Otherwise, particulate matter that has been accumulated in the ceramic filter could not be removed completely, generating a gap between the amount of accumulated particulate matter recognized by the engine electronic control unit and the actual amount. In this case, diagnosis codes related to the diesel particulate filter would be issued.



Pressure difference measurement (Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter)



(1) When difference is below 20 kPa



(2) When difference is 20 kPa or more



(History of DPF-related



(1.1) Diesel particulate filter information is initialized regeneration by Multi-Use Tester at this time)



(2.1) Visual check



NG



OK Is this inspection conducted for cleaning that should be performed every 3 years or 150,000 km after ceramic filter was replaced?



NO



YES



7.5 kPa or more (1.5) Pressure difference measurement Less than 7.5 kPa NG (1.2) Visual check



(2.2) Cleaning



(2.3) Pressure difference 20 kPa or more measurement Less than 20 kPa (2.4) Diesel particulate filter regeneration by Multi-Use Tester (History of DPF-related information is initialized at this time)



OK (1.3) Cleaning 7.5 kPa (1.4) Pressure difference or more measurement Less than 7.5 kPa



Replace



Inspection complete



Replace



(2.5) Cleaning



(2.6) Pressure difference measurement 7.5 kPa or Less than more 7.5 kPa



(2.7) Initialization of the DPF-related information



Replace



Inspection complete



DPF: Diesel particulate filter



15-31



ON-VEHICLE INSPECTION AND ADJUSTMENT • Measure the pressure difference following the procedure shown below. • Check that the exhaust gas temperature is 150°C to 300°C. (Check by Multi-Use Tester service data “0F: Exhaust gas temperature 1”.) • Fully press the accelerator pedal (no-load maximum speed). • Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter. (Measure by Multi-Use Tester service data “11: Difference pressure across DPF”.) • If the pressure difference is below 20 kPa, follow the procedure (1) shown below. If the pressure difference is 20 kPa or more, follow the procedure (2). (1) When pressure difference between exhaust gas inlet and outlet of diesel particulate filter is below 20 kPa (1.1) Regeneration by Multi-Use Tester • In this regeneration, the temperature of the ceramic filter is raised to burn the particulate matter collected in it. When burning the particulate matter, the ceramic filter may emit a burning odor, which is not abnormal. • Idle the engine (no-load minimum speed). • Apply the parking brake securely. • Conduct the regeneration of the diesel particulate filter using the Multi-Use Tester. (Perform actuator test by Multi-Use Tester “A2: DPF Regeneration”.)



CAUTION • Do not perform the regeneration near flammable objects because exhaust gas becomes very hot. • During regeneration, the engine speed increases. (1.2) Visual check • Disassemble the diesel particulate filter and check for the following items. • Adhesion of a large amount of soot to the inside of the outlet body • Damage to the rear end of the ceramic filter • If a large amount of soot is adhered to the inside of the outlet body, check the exhaust gas because engine-related parts may be abnormal. (See later section.)



DPF: Diesel particulate filter



15-32



15 (1.3) Cleaning • The purpose of the cleaning made after regeneration is to remove the ashes produced from the combustion of particulate matters (PM). • Set the filter body in with the exhaust gas outlet side facing upward. (Outlet body side) • Adjust the air tank pressure of to 0.6 MPa {6.1 kgf/cm2} and press and hold the operation switch for more than 3 seconds. • Repeat the above operation 5 times. • shall be operated in accordance with the operation manual.



(1.4) Pressure difference measurement • The purpose of the differential pressure measurements taken after the cleaning is to verify that the inside of the diesel particulate filter is cleaned up sufficiently. • Check that the exhaust gas temperature is 150°C to 300°C. (Check by Multi-Use Tester service data “0F: Exhaust gas temperature 1”.) • Fully press the accelerator pedal (no-load maximum speed). • Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter. (Measure by Multi-Use Tester service data “11: Difference pressure across DPF”.) (1.5) Pressure difference measurement • The purpose of the differential pressure measurements taken after the cleanings which are not performed at an interval of 3 years or 150,000 km running is to check if the Particulate matter (PM) deposit affects the regeneration control of the diesel particulate filter. • Check that the exhaust gas temperature is 150°C to 300°C. (Check by Multi-Use Tester service data “0F: Exhaust gas temperature 1”.) • Fully press the accelerator pedal (no-load maximum speed). • Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter. (Measure by Multi-Use Tester service data “11: Difference pressure across DPF”.)



DPF: Diesel particulate filter



15-33



ON-VEHICLE INSPECTION AND ADJUSTMENT (2) When pressure difference between exhaust gas inlet and outlet of diesel particulate filter is 20 kPa or more (2.1) Visual check • Disassemble the diesel particulate filter and check for the following items. • Adhesion of a large amount of soot to the inside of the outlet body • Damage to the rear end of the ceramic filter • If a large amount of soot is adhered to the inside of the outlet body, check the exhaust gas because engine-related parts may be abnormal. (See later section.)



(2.2) Cleaning • The purpose of the cleaning made before regeneration is to remove the excessive ashes beforehand because the regeneration (combustion) with a large amount of ashes accumulated on the ceramic filter can cause the filter section to break. • Set the filter body in with the exhaust gas outlet side facing upward. (outlet body side) • Adjust the air tank pressure of to 0.6 MPa {6.1 kgf/cm2} and press and hold the operation switch for more than 3 seconds. • Repeat the above operation 5 times. • shall be operated in accordance with the operation manual.



(2.3) Pressure difference measurement • The purpose of the differential pressure measurements taken after the cleaning is to verify that the inside of the diesel particulate filter is cleaned up sufficiently. • Check that the exhaust gas temperature is 150°C to 300°C. (Check by Multi-Use Tester service data “0F: Exhaust gas temperature 1”.) • Fully press the accelerator pedal (no-load maximum speed). • Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter. (Measure by Multi-Use Tester service data “11: Difference pressure across DPF”.) DPF: Diesel particulate filter



15-34



15 (2.4) Regeneration by Multi-Use Tester • In this regeneration, the temperature of the ceramic filter is raised to burn the particulate matter collected in it. When burning the particulate matter, the ceramic filter may emit a burning odor, which is not abnormal. • Idle the engine (no-load minimum speed). • Apply the parking brake securely. • Conduct the regeneration of the diesel particulate filter using the Multi-Use Tester. (Perform actuator test by Multi-Use Tester “A2: DPF Regeneration”.)



CAUTION • Do not perform the regeneration near flammable objects because exhaust gas becomes very hot. • During regeneration, the engine speed increases. (2.5) Cleaning • The purpose of the cleaning made before regeneration is to remove the ashes produced from the combustion of particulate matters (PM). • Set the filter body in with the exhaust gas outlet side facing upward. (outlet body side) • Adjust the air tank pressure of to 0.6 MPa {6.1 kgf/cm2} and press and hold the operation switch for more than 3 seconds. • Repeat the above operation 5 times. • shall be operated in accordance with the operation manual.



(2.6) Pressure difference measurement • The purpose of the differential pressure measurements taken after twice the cleaning is to verify that the inside of the diesel particulate filter is cleaned up sufficiently. • Check that the exhaust gas temperature is 150°C to 300°C. (Check by Multi-Use Tester service data “0F: Exhaust gas temperature 1”.) • Fully press the accelerator pedal (no-load maximum speed). • Measure the pressure difference between the exhaust gas inlet and outlet of the diesel particulate filter. (Measure by Multi-Use Tester service data “11: Difference pressure across DPF”.) (2.7) Initialization of the DPF-related information • Initialize the historical records of DPF-related information using Multi-Use Tester. (See “9. Initialization of the DPF-Related Information”.) DPF: Diesel particulate filter



15-35



ON-VEHICLE INSPECTION AND ADJUSTMENT 8. Inspection of Exhaust Gas • If the diesel particulate filter clogs early, or if a large amount of soot adheres inside the diesel particulate filter outlet body, check whether it is caused by the engine-related (engine, common rail system, exhaust gas recirculation system, etc.) fault or not as follows.



CAUTION • Diesel particulate filter has become very hot after the operation of engine. Cool down the diesel particulate filter sufficiently so as not to get burnt.



Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened Nut (diesel particulate filter mounting) Nut (tail pipe mounting)



Tightening torque



Remarks



26 to 33 {2.7 to 3.4}



–



Special tools (Unit: mm) Mark



Tool name and shape



Dummy pipe



Part No.



MH063819



Application



Inspection of exhaust gas



8.1 Preparation • • • • •



Place the transmission in neutral. Turn the steering wheel in neutral position and securely apply the parking brake. Connect the Multi-Use Tester. (See Gr00.) Check diagnosis code of each electronic control system. If any fault exists, rectify it. Warm up the engine until the engine coolant has been heated to more than 70°C. (Check by Multi-Use Tester service data “13: Water temperature”.)



8.2 Inspection procedure • Remove diesel particulate filter, each sensor, pipe and hose and install between front pipe and tail pipe. (See “DIESEL PARTICULATE FILTER”.) • Race the engine with the tool attached and check to see if the exhaust gas is white or black. If any apparently white or black smoke is emitted, check the following and repair the faulty components as necessary. • Common rail system (See Gr13.) • Exhaust gas recirculation system (See Gr17.) • Exhaust shutter • Air cleaner • Turbocharger • Boost pressure • Compression pressure (See Gr11.) • After inspection, remove and install diesel particulate filter between front pipe and tail pipe. Then reinstall the removed sensors, pipes and hoses. (See “DIESEL PARTICULATE FILTER”.) • Be sure to erase diagnosis codes after the end of inspection as engine warning lamp may illuminate by diagnostic function when sensors installed on diesel particulate filter are removed. DPF: Diesel particulate filter



15-36



15 9. Initialization of the DPF-Related Information • The engine electronic control unit stores the DPF-related information as historical records to facilitate the regeneration of the diesel particulate filter. • The initialization of the DPF-related information is performed to make the particulate matter (PM) deposit recognized by the engine electronic control unit coincide with the actual particulate matter (PM) deposit accumulated in diesel particulate filter after replacing or cleaning diesel particulate filter. • The initialization of the DPF-related information should be performed using a Multi-Use Tester as follows:



9.1 Preparation • This operation should be performed under the following conditions. • Starter switch: ON (but do not start engine) • Vehicle stationary • Diagnosis switch: ON (fuse connected) • T/M: Place the gearshift lever in the neutral position.



9.2 Initialization of the DPF-related information (1) System selection • Select “Engine/Transmission” from the system selection menu. Then select “Engine control” from the menu. After a short while, the menu for the engine control will be displayed. • Select the “ECU Reset”.



(2) ECU reset function selection Screen for selecting [ECU Reset] functions • Select the “History reset”.



(3) History reset Screen for selecting [History Reset] functions • Select No. 01 “DPF-related information”. • Click “Reset” button. If “No memory” is displayed in the “Status”, this work sequence is ended because of absence of any history necessary to be reset.



ECU: Electronic control unit DPF: Diesel particulate filter



15-37



ON-VEHICLE INSPECTION AND ADJUSTMENT [History reset confirmation] screen • Click “OK” button.



[History resetting] screen • During resetting, do nothing and wait for a while.



[History reset completed] screen • The screen shown at left will be displayed when the resetting is completed. Press “OK” button, and the [History reset] screen is restored.



• Following screen will appear if abnormality occurred during resetting. [History reset condition error] screen • This screen will appear when a execution failure signal is sent from the engine electronic control unit to the Multi-Use Tester during resetting. • In this case, check if the conditions for the execution of the procedure are satisfied and retry from the beginning. • Click “OK” to return to the [History reset] screen.



[History reset failed] screen • This screen will appear when the communication error between Multi-Use Tester and the engine electronic control unit or the resetting error occurs. • In this case, check if the Multi-Use Tester and the vehicle (engine electronic control unit) is connected correctly and if the conditions for the execution of this procedure are satisfied. Retry from the beginning. • Click “OK” to return to the [History reset] screen.



15-38



15 [ECU reset condition error] screen • This screen will appear when a execution failure signal is sent from the engine electronic control unit to the Multi-Use Tester during resetting. • In this case, check if the conditions for the execution of the procedure are satisfied and retry from the beginning. • Click “OK” to return to the [History reset] screen.



Error while operating the Multi-Use Tester [Communication error] screen • The screen shown at left will be displayed when the communication between the engine electronic control unit and Multi-Use Tester is disabled during some operation being executed. • In this case, check if the conditions for the execution of the procedure are satisfied and retry from the beginning. • Click “OK” button.



ECU: Electronic control unit



15-39



TURBOCHARGER CONTROL SYSTEM 1. Diagnosis Procedure • Carry out system inspection in accordance with the flow chart given below. Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Clear stored diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition. • To start the engine, be sure to connect the connector of the MPROP (rail pressure control valve) to the engine harness. If the engine is started without connecting the MPROP connector, the engine electronic control unit cannot control the supply pump and the fault of the engine may result. • If the electronic control unit is replaced with a new one, some data must be registered in the new electronic control unit for proper engine control. This also applied to the case when replacing the electronic control unit with the one that has been used in other vehicle. (See Gr13.)



15-40



15 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • The Multi-Use Tester is capable of showing more detailed diagnosis codes. • The control during fault recovers by servicing the faults. However, for some diagnosis codes, the warning lamp stays illuminated until the normal signals are input for several times. Code



Warning lamp indication



Message



Flashes



Orange



Red



P0045



VGT Actuator (Open)



51



O



–



P0046



VGT Actuator (Performance)



51



O



–



P0047



VGT Actuator (Low)



51



O



–



P0234



Over Boost



54



O



–



P0237



Boost Press SNSR (Low)



32



O



–



P0238



Boost Press SNSR (High)



32



O



–



P0685



EDU Relay (Open)



84



O



–



P0686



EDU Relay (Low)



84



O



–



P0687



EDU Relay (High)



84



O



–



P0688



EDU Relay (Over Load)



84



O



–



P1645



CAN Communication (VGT)



76



O



–



P2263



VGT System



51



O



–



P2562



VGT Position Sensor



51



O



–



3.2 Diagnosis code generation conditions and inspection items P0045: VGT Actuator (Open) (warning lamp flashes: 51) Generation condition



Open turbocharger actuator circuit



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • •



Inspection



Injection quantity is limited. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped. Actuator tests “A5: VGT” is stopped.



Electrical equipment



#514: Turbocharger actuator



Electric circuit diagram



Turbocharger actuator system



P0046: VGT Actuator (Performance) (warning lamp flashes: 51) Generation condition



Turbocharger actuator circuit is overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • •



Inspection



Injection quantity is limited. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped. Actuator tests “A5: VGT” is stopped.



Electrical equipment



#514: Turbocharger actuator



Electric circuit diagram



Turbocharger actuator system



15-41



TURBOCHARGER CONTROL SYSTEM P0047: VGT Actuator (Low) (warning lamp flashes: 51) Generation condition



Turbocharger actuator circuit is shorted.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • •



Inspection



Injection quantity is limited. Exhaust gas recirculation valve control is stopped. Throttle control is stopped. Turbocharger control is stopped. Actuator tests “A5: VGT” is stopped.



Electrical equipment



#514: Turbocharger actuator



Electric circuit diagram



Turbocharger actuator system



P0234: Over Boost (warning lamp flashes: 54) Generation condition



The boost pressure is kept higher than the upper limit for 10 seconds. (The boost pressure varies depending on not only the engine speed but the barometric pressure.) The warning lamp (orange) is lit when the faulty condition is sustained for 10 seconds after this diagnosis code is generated.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Injection quantity is limited.



Service data Inspection Actuator test Other



0C: Boost Pressure A5: VGT Turbocharger



P0237: Boost Press SNSR (Low) (warning lamp flashes: 32) Generation condition



Boost pressure sensor voltage remains less than 0.3 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Backup value (101.3 kPa) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Service data Inspection



24: Boost Press SNSR Voltage



Electronic control unit connector 03 : Boost pressure sensor Electrical equipment



#318: Boost pressure sensor



Electric circuit diagram



Boost pressure sensor system



P0238: Boost Press SNSR (High) (warning lamp flashes: 32) Generation condition



Boost pressure sensor voltage remains higher than 4.9 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Backup value (101.3 kPa) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Service data Inspection



15-42



24: Boost Press SNSR Voltage



Electronic control unit connector 03 : Boost pressure sensor Electrical equipment



#318: Boost pressure sensor



Electric circuit diagram



Boost pressure sensor system



15 P0685: EDU Relay (Open) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay is open-circuited.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration control is stopped. • Intake throttle control is stopped.



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Inspection Electronic control unit connector



02 : Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P0686: EDU Relay (Low) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay circuit is shorted to ground.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration control is stopped. • Intake throttle control is stopped.



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Inspection Electronic control unit connector



02 : Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P0687: EDU Relay (High) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay circuit is shorted to power supply side.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration control is stopped. • Intake throttle control is stopped.



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Inspection Electronic control unit connector



02 : Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P0688: EDU Relay (Over Load) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay circuit is over loaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • DPF regeneration control is stopped. • Intake throttle control is stopped.



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Inspection Electronic control unit connector



02 : Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



DPF: Diesel particulate filter



15-43



TURBOCHARGER CONTROL SYSTEM P1645: CAN Communication (VGT) (warning lamp flashes: 76) Generation condition



The controller area network signals from the turbocharger electronic drive unit cannot be received within the specified time duration. Diagnosis code P1632, P1635 or U0073 may occur simultaneously (if these diagnosis codes occur at the same time, possibility is high that harness somewhere near engine electronic control unit is faulty)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• • • • •



Inspection



Exhaust gas recirculation valve control is stopped. Turbocharger control is stopped. DPF regeneration control is stopped. Intake throttle control is stopped. Actuator tests “A5: VGT” is stopped.



Service data



22: VGT Position



Actuator test



AD: EDU Relay



Electronic control unit connector



01 : Controller area network resistor, 02 : Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay, #828: Controller area network resistor



Electric circuit diagram



Controller area network communication between engine electronic control unit and turbocharger electronic drive unit, turbocharger electronic drive unit power system



P2263: VGT System (warning lamp flashes: 51) Generation condition



The turbocharger actuator fails to operate in accordance with the commands from the turbocharger electronic drive unit even in the operable range or is forced to come out of the operable range.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Inspection



Fuel injection rate is limited. Exhaust gas recirculation valve control is stopped. Turbocharger control is stopped. DPF regeneration control is stopped. Intake throttle control is stopped. Actuator tests “A5: VGT” is stopped.



Electrical equipment



#514: Turbocharger actuator



Electric circuit diagram



Turbocharger actuator system



P2562: VGT Position Sensor (warning lamp flashes: 51) Generation condition



Turbocharger electronic drive unit determines the turbocharger position sensor to be faulty.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • • •



Inspection



Electrical equipment



#514: Turbocharger actuator



Electric circuit diagram



Turbocharger actuator system



DPF: Diesel particulate filter



15-44



Fuel injection rate is limited. Exhaust gas recirculation valve control is stopped. Turbocharger control is stopped. DPF regeneration control is stopped. Intake throttle control is stopped. Actuator tests “A5: VGT” is stopped.



15 4. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No.



Item



0C



Boost Pressure



.



kPa



22



VGT Position



.



%



24



89



Boost Press SNSR Voltage



EDU Power Relay



Data



.



ON/OFF



mV



Inspection condition



Requirement



Engine speed: 3700 rpm



120 ± 2 kPa



When engine is stationary



100%



When vehicle is running



10 to 85%



Sensor circuit open circuited or shorted to power supply



Approx. 5000 mV



Sensor circuit shorted to ground



Approx. 0 mV



Starter switch ON



ON



Starter switch OFF



OFF



[Actuator test] AC: EDU Relay



5. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



A5



AC



Item



Explanation



Confirmation method



VGT



Maintain turbocharger throttle opening indicated by Multi-Use Tester during engine operation. [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON (engine started) • Transmission: neutral • Diagnosis switch: OFF (with fuse removed) NOTE • Adjust turbocharger throttle opening within the range from 15% to 80%.



See “Measurement and Adjustment of Turbocharger Boost Pressure”. [Service data] 22: VGT Position



EDU Relay



Electronic drive unit relay drive signal Operating sound of relay (Errors related to exhaust gas recirculation and to the [Service data] intake throttle can be detected when this actuator test 89: EDU Power Relay is executed.)



15-45



TURBOCHARGER CONTROL SYSTEM 6. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 and so on) correspond to the similarly printed reference number in section “3. Inspections Based on Diagnosis Codes”.



6.1 Electronic control unit connector terminal layout



6.2 Inspection instructions • Some inspections are performed with the connectors removed. Others are performed with the connectors fitted.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes. Check item 01



Resistance of controller area network resistor



02



Voltage of electronic drive unit relay



03



Voltage of boost pressure sensor



15-46



Measurement [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: B5-B6 • 120 ± 6 [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): B39-B14 • With relay operating: Corresponding to battery voltage • With relay not operating: 0 V [Conditions] • Starter switch ON • Engine: idling • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): A34-A14 • Higher than 0.3 V and lower than 4.9 V (no continuity between each terminal and chassis ground and between terminals)



15 7. Inspection of Electrical Equipment #201 Inspection of relay (normally open, 5 pins) • Perform a continuity check and an operation check. If there is any abnormality, replace the relay.



#318 Inspection of boost pressure sensor • Apply 5 volts DC to terminals 3 and 1. • Apply air pressure. Gradually increase it and, while doing so, measure the output voltage occurring at terminals 2 and 1. Standard value



Air pressure (gauge pressure)



Voltage



99 kPa {1.0 kgf/cm2} 232.3 kPa {2.3 kgf/cm



2}



Approx. 2.5 V Approx. 4.5 V



• If any measurement is out of specification, replace the sensor.



#514 Inspection of turbocharger actuator • Perform the following checks. If there is any abnormality, replace the turbocharger actuator. (1) Coil resistance of motor • Measure the resistance between terminals 8 and 7, the resistance between terminals 8 and 6, and the resistance between terminals 7 and 6. Standard value



2.1 ± 0.3 Ω



(2) Position sensor • The sensor cannot easily be inspected in isolation, so you must evaluate it indirectly by inspection of system harnesses and related parts. • lf there is no abnormality in any related part but the system is abnormal, replace the turbocharger actuator. #828 Inspection of controller area network resistor • Measure the resistance between terminals 1 and 2. Standard value (at 20°C)



120 ± 6 Ω



• If the measurement is out of specification, replace the controller area network resistor.



15-47



TURBOCHARGER CONTROL SYSTEM 8. Installed Locations of Parts



15-48



15



15-49



TURBOCHARGER CONTROL SYSTEM



15-50



15



15-51



TURBOCHARGER CONTROL SYSTEM



15-52



15 9. Electric Circuit Diagram



15-53



TURBOCHARGER CONTROL SYSTEM



15-54



15 M E M O



15-55



DIESEL PARTICULATE FILTER REGENERATION SYSTEM 1. Diagnosis Procedure • Carry out system inspection in accordance with the flow chart given below. Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Clear stored diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition. • To start the engine, be sure to connect the connector of the MPROP (rail pressure control valve) to the engine harness. If the engine is started without connecting the MPROP connector, the engine electronic control unit cannot control the supply pump and the fault of the engine may result. • If the electronic control unit is replaced with a new one, some data must be registered in the new electronic control unit for proper engine control. This also applied to the case when replacing the electronic control unit with the one that has been used in other vehicle. (See Gr13.)



15-56



15 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • The Multi-Use Tester is capable of showing more detailed diagnosis codes. • The control during fault recovers by servicing the faults. However, for some diagnosis codes, the warning lamp stays illuminated until the normal signals are input for several times. Code



Warning lamp indication



Message



Flashes



Orange



Red



P0472



DPF Press SNSR (Low)



98



O



–



P0473



DPF Press SNSR (High)



98



O



–



P0545



DPF Temp SNSR (upstream) Low



87



O



–



P0546



DPF Temp SNSR (upstream) High



87



O



–



P1410



Exhaust Absolute Pressure (High)



92



O



–



P1411



Excessive exhaust Temperature



92



–



–



P1412



DPF Temp Abnormal 1 (Auto) (Low)



92



–



–



P1413



DPF Temp Abnormal 2 (Auto) (Low)



92



–



–



P1414



DPF Temp Abnormal 3 (Auto) (High)



92



–



–



P1415



DPF Interval Abnormal (Auto)



92



–



–



P1416



DPF Temp Abnormal 1 (Manual) (Low)



92



O



–



P1417



DPF Temp Abnormal 2 (Manual) (Low)



92



O



–



P1418



DPF Temp Abnormal 3 (Manual) (High)



92



O



–



P1419



DPF Interval Abnormal (Manual)



92



O



–



P1421



PM accumulation amount level 1



92



O



–



P1422



PM accumulation amount level 2



92



O



–



P1430



DPF Regeneration Switch



7B



O



–



P1435



Exhaust Relative Pressure (Low)



92



O



–



P1440



DPF Temp Abnormal 4 (Auto)



92



–



–



P1441



DPF Temp Abnormal 4 (Manual)



92



–



–



P1447



Catalyst Temp Sensor (Low)



13



O



–



P1448



Catalyst Temp Sensor (High)



13



O



–



P1660



DPF Lamp Control Circuit (Low)



29



O



–



P2032



Exhaust Gas Temp (Low)



88



O



–



P2033



Exhaust Gas Temp (High)



88



O



–



P2453



DPF Diff SNSR (Plausi) & MFF



97



O



–



P2454



DPF Diff SNSR (Low) & MFF



97



O



–



P2455



DPF Diff SNSR (High) & MFF



97



O



–



3.2 Diagnosis code generation conditions and inspection items P0472: DPF Press SNSR (Low) (warning lamp flashes: 98) Generation condition



Diesel particulate filter absolute pressure sensor voltage is at or below the specified value (0.38 V).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Exhaust pressure measurement is disabled (operations are continued with exhaust pressure in diesel particulate filter fixed at 101.3 kPa (barometric pressure).)



Service data Inspection



Electronic control unit connector



12: Exhaust gas pressure, 2B: Exhaust gas pressure 02



: Diesel particulate filter absolute pressure sensor



Electrical equipment



#334: Diesel particulate filter absolute pressure sensor



Electric circuit diagram



Diesel particulate filter absolute pressure sensor system



DPF: Diesel particulate filter



15-57



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P0473: DPF Press SNSR (High) (warning lamp flashes: 98) Generation condition



Diesel particulate filter absolute pressure sensor voltage is at or above the specified value (4.87 V).



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Exhaust pressure measurement is disabled (operations are continued with exhaust pressure in diesel particulate filter fixed at 101.3 kPa (barometric pressure).)



Service data Inspection



Electronic control unit connector



12: Exhaust gas pressure, 2B: Exhaust gas pressure 02



: Diesel particulate filter absolute pressure sensor



Electrical equipment



#334: Diesel particulate filter absolute pressure sensor



Electric circuit diagram



Diesel particulate filter absolute pressure sensor system



P0545: DPF Temp SNSR (upstream) Low (warning lamp flashes: 87)



Generation condition



The voltage of exhaust gas temperature sensor 1 is lower than 0.35 V for 3 seconds while all of the following conditions are met. • Water temperature: 70°C or more • Engine speed: 2000 rpm or more • Target injection quantity is within the specified value



Recoverability



System recovers if any normal signal is received with all of the following conditions met. • Water temperature: 70°C or more • Engine speed: 2000 rpm or more • Target injection quantity is within the specified value



Control effected by electronic control unit



• Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature before ceramic filter fixed at 20°C.) • DPF regeneration control is stopped.



Service data Inspection



Electronic control unit connector



03



: Exhaust gas temperature sensor 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



DPF: Diesel particulate filter



15-58



2C: Exhaust gas temp SNSR1 Voltage



15 P0546: DPF Temp SNSR (upstream) High (warning lamp flashes: 87)



Generation condition



Either of the following occurs. (1) The voltage of exhaust gas temperature sensor 1 is higher than 4.8 V for 2 minutes while all of the following diagnosis conditions are met. (The exhaust gas temperature does not rise irrespective of a certain amount of load being applied.) • Water temperature: 70°C or more • Engine speed: 2000 rpm or more • Target injection quantity is within the specified value (2) The voltage of exhaust gas temperature sensor 1 is higher than 4.8 V for 20 seconds while all of the following diagnosis conditions are met. • More than 20 minutes passed after the engine was started. • The catalyst temperature sensor is in a normal condition and the measured temperature is higher than 125°C. (These are confirmed from the Service Data “21: Catalyst Temp SNSR”.) • The temperature measured by exhaust gas temperature sensor 1 is not varied since the engine is started. (This is confirmed from the Service Data “0F: Exhaust gas temperature 1”.)



Recoverability



[In the case of above problem (1)] • System recovers if any normal signals are received while all of the conditions mentioned in Generation condition (1) are met. [In the case of above problem (2)] • System recovers when the diagnosis code is erased after all faulty parts are remedied. (System recovery by turning starter switch to OFF and then ON does not take place because the detection of generation conditions is very difficult.)



Control effected by electronic control unit



• Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature before ceramic filter fixed at 20°C.) • Function for calculating the particulate matter (PM) deposit based on exhaust gas temperature at diesel particulate filter inlet is disabled. • DPF regeneration control is stopped.



Service data Inspection



2C: Exhaust gas temp SNSR1 Voltage



Electronic control unit connector



03



: Exhaust gas temperature sensor 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



P1410: Exhaust Absolute Pressure (High) (warning lamp flashes: 92) Generation condition



Diesel particulate filter absolute pressure sensor measurement value remains over 146.3 kPa for 3 seconds.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• • • • •



Injection quantity is limited. Function for calculating the particulate matter (PM) deposit is disabled. DPF regeneration control is stopped. Exhaust gas recirculation valve control is stopped. Intake throttle control is stopped.



Service data



12: Exhaust gas pressure 1



Electrical equipment



#334: Diesel particulate filter absolute pressure sensor



Electric circuit diagram



Diesel particulate filter absolute pressure sensor system



Other



• The inside of ceramic filter is clogged by excessively accumulated particulate matters (PM) and ashes. • Turbocharger • Injector (Have work performed by Bosch.) • Diesel particulate filter absolute pressure sensor • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



DPF: Diesel particulate filter



15-59



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P1411: Excessive exhaust Temperature (warning lamp flashes: 92) Generation condition



Exhaust gas temperature sensor 2 measurement value remains over 750°C for 30 seconds. (Excessively high temperature of ceramic filter.)



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped. • Idling stop & start system control is stopped.



Service data



10: Exhaust gas temperature 2



Electrical equipment



#336: Exhaust gas temperature sensor 2



Other



• Discrepancy between target fuel injection rate calculated by electronic control unit and actual fuel injection rate • Engine and injection quantity adjustment resistor number unmatched • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil • Damage of ceramic filter



Inspection



P1412: DPF Temp Abnormal 1 (Auto) (Low) (warning lamp flashes: 92)



Generation condition



During temperature rise control for diesel particulate filter automatic regeneration in progress is encountered 3 times the situation where any measurements by exhaust gas temperature sensor 1 do not reach the temperature necessary for the temperature rise control even after driving over 5 km or for more than 5 minutes. (Insufficient temperature rise of front oxidation catalyst during diesel particulate filter automatic regeneration control.) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.) Where this diagnosis code is issued, diagnosis code P1440 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is completed.



Control effected by electronic control unit



DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Insufficient temperature rise of front oxidation catalyst during diesel particulate filter automatic regeneration control • Driving style which hardly subjects the vehicle to heavy loads is used or the vehicle is driven in severe operating conditions • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Exhaust gas temperature sensor 1 • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



DPF: Diesel particulate filter



15-60



15 P1413: DPF Temp Abnormal 2 (Auto) (Low) (warning lamp flashes: 92)



Generation condition



After particulate matter (PM) combustion control of diesel particulate filter automatic regeneration is started, is encountered once the situation where more than 15 minutes passed without any measurements by exhaust gas temperature sensor 1 not reaching the temperature required for enabling regeneration of ceramic filter. (Poor ceramic filter temperature control during diesel particulate filter automatic regeneration control.) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.) Where this diagnosis code is issued, diagnosis code P1440 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is completed.



Control effected by electronic control unit



DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Insufficient temperature rise of ceramic filter during diesel particulate filter automatic regeneration control • Driving style which hardly subjects the vehicle to heavy loads is used or the vehicle is driven in severe operating conditions • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Exhaust gas temperature sensor 1 • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



P1414: DPF Temp Abnormal 3 (Auto) (High) (warning lamp flashes: 92)



Generation condition



After particulate matter (PM) combustion control of diesel particulate filter automatic regeneration is started, is encountered 3 times the situation where more than 10 minutes passed with any measurements by exhaust gas temperature sensor 1 exceeding the upper temperature limit for regeneration of ceramic filter. (Poor ceramic filter temperature control during diesel particulate filter automatic regeneration control.) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.) Where this diagnosis code is issued, diagnosis code P1440 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is completed.



Control effected by electronic control unit



DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Abnormal combustion due to clogged ceramic filter inside • Abnormal temperature rise of ceramic filter during diesel particulate filter automatic regeneration control • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil • Exhaust gas temperature sensor 1



Inspection



DPF: Diesel particulate filter



15-61



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P1415: DPF Interval Abnormal (Auto) (warning lamp flashes: 92)



Generation condition



Diesel particulate filter automatic regeneration is conducted for abnormally longer time (more than 35 minutes). (Diesel particulate filter automatic regeneration is not completed due to poor diesel particulate filter temperature control.) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.) Where this diagnosis code is issued, diagnosis code P1440 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is completed.



Control effected by electronic control unit



DPF regeneration control is stopped.



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Prolonged diesel particulate filter automatic regeneration time due to use of driving style which hardly subjects the vehicle to heavy loads or due to driving in severe operating conditions. • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Dirty sensing section of exhaust gas temperature sensor • Air flow sensor • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



P1416: DPF Temp Abnormal 1 (Manual) (Low) (warning lamp flashes: 92)



Generation condition



During temperature rise control for diesel particulate filter parked regeneration in progress, any measurements by exhaust gas temperature sensor 1 do not reach the temperature necessary for the temperature rise control even after elapse of 5 minutes. (Insufficient temperature rise of front oxidation catalyst during diesel particulate filter parked regeneration control.) Where this diagnosis code is issued, diagnosis code P1441 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration is performed using diesel particulate filter cleaning switch after initializing DPF-related information is completed.



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Insufficient temperature rise of front oxidation catalyst during diesel particulate filter parked regeneration control • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Dirty sensing section of exhaust gas temperature sensor • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



DPF: Diesel particulate filter



15-62



15 P1417: DPF Temp Abnormal 2 (Manual) (Low) (warning lamp flashes: 92)



Generation condition



After particulate matter (PM) combustion control of diesel particulate filter parked regeneration is started, more than 30 minutes have passed without any measurements by exhaust gas temperature sensor 1 not reaching the temperature required for enabling regeneration of ceramic filter. (Poor ceramic filter temperature control during diesel particulate filter parked regeneration control.) Where this diagnosis code is issued, diagnosis code P1441 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration is performed using diesel particulate filter cleaning switch after initializing DPF-related information is completed.



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Insufficient temperature rise of ceramic filter during diesel particulate filter parked regeneration control • Driving style which hardly subjects the vehicle to heavy loads is used or the vehicle is driven in severe operating conditions • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Dirty sensing section of exhaust gas temperature sensor • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



P1418: DPF Temp Abnormal 3 (Manual) (High) (warning lamp flashes: 92)



Generation condition



After particulate matter (PM) combustion control of diesel particulate filter parked regeneration is started, more than 10 minutes have passed with any measurements by exhaust gas temperature sensor 1 exceeding the upper temperature limit for regeneration of ceramic filter. (Poor ceramic filter temperature control during diesel particulate filter parked regeneration control.) Where this diagnosis code is issued, diagnosis code P1441 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration is performed using diesel particulate filter cleaning switch after initializing DPF-related information is completed.



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped.



Service data



0F: Exhaust gas temperature 1



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Abnormal combustion due to clogged ceramic filter inside • Abnormal temperature rise of ceramic filter during diesel particulate filter automatic regeneration control • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



DPF: Diesel particulate filter



15-63



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P1419: DPF Interval Abnormal (Manual) (warning lamp flashes: 92)



Generation condition



Diesel particulate filter parked regeneration is conducted for abnormally longer time (more than 60 minutes). (Diesel particulate filter parked regeneration is not completed due to poor diesel particulate filter temperature control.) Where this diagnosis code is issued, diagnosis code P1441 is left in the record of past diagnosis codes.



Recoverability



System recovers when diesel particulate filter parked regeneration is performed using diesel particulate filter cleaning switch after initializing DPF-related information is completed.



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped.



Electrical equipment



#336: Exhaust gas temperature sensor 1



Electric circuit diagram



Exhaust gas temperature sensor 1 system



Other



• Prolonged diesel particulate filter parked regeneration time due to defective parts associated with diesel particulate filter regeneration control • Exhaust shutter • Intake throttle • Injector (Have work performed by Bosch.) • Dirty sensing section of exhaust gas temperature sensor • Air flow sensor • Deterioration of front oxidation catalyst (incorporated in inlet body) • Poor combustion due to use of incorrect fuel • Poor combustion due to use of incorrect engine oil



Inspection



P1421: PM accumulation amount level 1 (warning lamp flashes: 92)



Generation condition



If the vehicle is continued to be driven even after diesel particulate filter parked regeneration request is issued (diesel particulate filter indicator blinks rapidly) and the particulate matter (PM) deposit estimated by engine electronic control unit becomes larger than the specified value (clogging level: low) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.)



Recoverability



System recovers when diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is completed.



Control effected by electronic control unit



• Injection quantity is limited. • Idling stop & start system control is stopped.



Inspection



Check the following items which can cause this diagnosis code to be generated. 1. Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is not performed yet. 2. Parked regeneration is disabled because the following parts are faulty. • DPF indicator (meter cluster) • DPF cleaning switch • Parking brake switch • A5 fuse • M1 fuse • INOMAT-II electronic control unit



Other



P1422: PM accumulation amount level 2 (warning lamp flashes: 92)



Generation condition



If the vehicle is continued to be driven even after diesel particulate filter parked regeneration request is issued (diesel particulate filter indicator blinks rapidly) and the particulate matter (PM) deposit estimated by engine electronic control unit becomes larger than the specified value (clogging level: high)



Recoverability



System recovers when diesel particulate filter parked regeneration is performed using diesel particulate filter cleaning switch after initializing DPF-related information is completed.



Control effected by electronic control unit



• Injection quantity is limited. • DPF regeneration control is stopped. • Idling stop & start system control is stopped.



Inspection



If “P1421: PM accumulation amount level 1” is recorded in the “Past diagnosis codes”, check the diesel particulate filter body for clogging. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Other



DPF: Diesel particulate filter



15-64



15 P1430: DPF Regeneration Switch (warning lamp flashes: 7B) Generation condition



When diesel particulate filter cleaning switch ON input is received continuously for 60 seconds during driving



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Inspection



Electronic control unit connector



74: DPF SW 06



: Diesel particulate filter cleaning switch



Electrical equipment



#089: Diesel particulate filter cleaning switch



Electric circuit diagram



Diesel particulate filter cleaning switch system



P1435: Exhaust Relative Pressure (Low) (warning lamp flashes: 92)



Generation condition



When all the conditions below are applicable. • Exhaust gas flow rate exceeds 600 m3/h. • Vehicle speed: 1 km/h or higher • Power take-off switch: OFF (Power take-off not activated.) • Measurements of less than 1.0 kPa are output continuously for 10 seconds from diesel particulate filter pressure sensor (for filter differential pressure detection). (Pressure difference between before and after ceramic filter is too small.)



Recoverability



System recovers when normal signals are received with all of the following conditions met. • Exhaust gas flow rate exceeds 600 m3/h. • Vehicle speed: 1 km/h or higher • Power take-off switch: OFF (Power take-off not activated.)



Control effected by electronic control unit



DPF regeneration control is stopped.



Inspection



• Slipped off, cracked, clogged or incorrectly connected pressure hose of diesel particulate filter differential pressure sensor • Slipped off, cracked or clogged pressure pipe of diesel particulate filter differential pressure sensor • Damage of ceramic filter



Other



P1440: DPF Temp Abnormal 4 (Auto) (warning lamp flashes: 92)



Generation condition



This diagnosis code is registered in the past diagnosis code log when the generation condition for any one of P1412 to P1415 diagnosis codes is met once. (This is not generated as a current diagnosis code.) (This diagnosis code does not indicate that there is a trouble in diesel particulate filter or associated parts. This is logged to show that the system has failed in diesel particulate filter automatic regeneration control.) (Diesel particulate filter parked regeneration by using diesel particulate filter cleaning switch is possible.)



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



DPF regeneration control is stopped.



Inspection



Refer to description for diagnosis codes which were generated simultaneously.



Other



P1441: DPF Temp Abnormal 4 (Manual) (warning lamp flashes: 92) Generation condition



When any one of P1416 to P1419 diagnosis codes is generated



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



DPF regeneration control is stopped.



Inspection



Refer to description for diagnosis codes which were generated simultaneously.



Other



DPF: Diesel particulate filter



15-65



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P1447: Catalyst Temp Sensor (Low) (warning lamp flashes: 13) Generation condition



Catalytic temperature sensor voltage remains less than 351.9 mV for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature before front oxidation catalyst fixed at 20°C). • DPF regeneration control is stopped.



Service data Inspection



Electronic control unit connector



21: Catalyst Temp SNSR, 29: Catalyst Temp SNSR Voltage 05



: Catalytic temperature sensor



Electrical equipment



#338: Catalytic temperature sensor



Electric circuit diagram



Catalytic temperature sensor system



P1448: Catalyst Temp Sensor (High) (warning lamp flashes: 13)



Generation condition



Either of the following occurs. (1) The voltage of catalytic temperature sensor is higher than 4.8 V for 20 seconds while all of the following diagnosis conditions are met. • Water temperature: 70°C or more • Engine speed: 2000 rpm or more • Target injection quantity is within the specified value (2) The voltage of catalytic temperature sensor is higher than approximately 1.8 V for 20 seconds while all of the following diagnosis conditions are met. • Exhaust gas temperature sensor is in a normal condition • More than 20 minutes passed after engine was started • Measurements by catalyst temperature sensor have been kept at an identical level since engine has started. • The temperature measured by exhaust gas temperature sensor is higher than 115°C (This is confirmed in Service Data “0F: Exhaust gas temperature 1”.)



Recoverability



[In the case of above problem (1)] • System recovers if any normal signals are received while all of the conditions mentioned in Generation condition (1) are met. [In the case of above problem (2)] • System recovers when the diagnosis code is erased after all faulty parts are remedied. (System recovery by turning starter switch to OFF and then ON does not take place because the detection of generation conditions is very difficult.)



Control effected by electronic control unit



• Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature before front oxidation catalyst fixed at 20°C). • DPF regeneration control is stopped.



Service data Inspection



Electronic control unit connector



21: Catalyst Temp SNSR, 29: Catalyst Temp SNSR Voltage 05



: Catalytic temperature sensor



Electrical equipment



#338: Catalytic temperature sensor



Electric circuit diagram



Catalytic temperature sensor system



P1660: DPF Lamp Control Circuit (Low) (warning lamp flashes: 29) Generation condition



Diesel particulate filter indicator lamp circuit is opened or shorted.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Effects no special control.



Service data Inspection



Electronic control unit connector B0: DPF Indicator Lamp Electric circuit diagram



DPF: Diesel particulate filter



15-66



8C: DPF Indicator Lamp Diesel particulate filter indicator lamp system



15 P2032: Exhaust Gas Temp (Low) (warning lamp flashes: 88) Generation condition



Exhaust gas temperature sensor 2 voltage remains less than 351.9 mV.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature after ceramic filter fixed at 20°C).



Service data Inspection



Electronic control unit connector



10: Exhaust gas temperature 2, 2D: Exhaust gas temp SNSR2 Voltage 04



: Exhaust gas temperature sensor 2



Electrical equipment



#337: Exhaust gas temperature sensor 2



Electric circuit diagram



Exhaust gas temperature sensor 2 system



P2033: Exhaust Gas Temp (High) (warning lamp flashes: 88)



Generation condition



Either of the following occurs. (1) The voltage of exhaust gas temperature sensor 2 is higher than 4.8 V for 2 minutes while all of the following diagnosis conditions are met. • Water temperature: 70°C or more • Engine speed: 2000 rpm or more • Target injection quantity is within the specified value (2) The voltage of exhaust gas temperature sensor 2 is higher than approximately 4,800 mV for 20 seconds while all of the following diagnosis conditions are met. • There are no faults in catalyst temperature sensor and exhaust gas temperature sensor 1. • More than 2 minutes passed after engine was started. • Measurements by exhaust gas temperature sensor 2 have been kept at an identical level since engine has started. • The temperature measured by exhaust gas temperature sensor 1 is higher than 150°C.



Recoverability



[In the case of above problem (1)] • System recovers if any normal signals are received while all of the conditions mentioned in Generation condition (1) are met. [In the case of above problem (2)] • System recovers when the diagnosis code is erased after all faulty parts are remedied. (System recovery by turning starter switch to OFF and then ON does not take place because the detection of generation conditions is very difficult.)



Control effected by electronic control unit



Exhaust gas temperature measurement is disabled (operations are continued with exhaust gas temperature after ceramic filter fixed at 20°C).



Service data Inspection



Electronic control unit connector



10: Exhaust gas temperature 2, 2D: Exhaust gas temp SNSR2 Voltage 04



: Exhaust gas temperature sensor 2



Electrical equipment



#337: Exhaust gas temperature sensor 2



Electric circuit diagram



Exhaust gas temperature sensor 2 system



P2453: DPF Diff SNSR (Plausi) & MFF (warning lamp flashes: 97)



Generation condition



The condition where pressure difference between before and after ceramic filter in diesel particulate filter exceeds the limit value to the negative side is continued for one minute. (Diesel particulate filter pressure difference exceeds the specified value to the negative side.) (The specified value for diesel particulate filter pressure difference is very small and it is very difficult to determine the variation of the value on Multi-Use Tester service data. Therefore, it may be possible that the diagnosis code is generated even if no value variations occurred actually.)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Function for calculating the particulate matter (PM) deposit based on exhaust gas pressure is disabled. • DPF regeneration control is stopped.



Inspection



Electrical equipment



#334: Diesel particulate filter differential pressure sensor



Other



• Pressure pipe and pressure hose clogged • Diesel particulate filter differential pressure sensor



DPF: Diesel particulate filter



15-67



DIESEL PARTICULATE FILTER REGENERATION SYSTEM P2454: DPF Diff SNSR (Low) & MFF (warning lamp flashes: 97) Generation condition



Diesel particulate filter differential pressure sensor voltage is at or below the specified value (0.38 V). (Diesel particulate filter pressure difference exceeds the specified value to the negative side.)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Diesel particulate filter pressure difference measurement is disabled (operations are continued with pressure difference between before and after ceramic filter in diesel particulate filter fixed at 0 kPa). • Function for calculating the particulate matter (PM) deposit based on exhaust gas pressure is disabled.



Service data Inspection



Electronic control unit connector



11: Difference pressure across DPF 01



: Diesel particulate filter differential pressure sensor



Electrical equipment



#334: Diesel particulate filter differential pressure sensor



Electric circuit diagram



Diesel particulate filter differential pressure sensor system



P2455: DPF Diff SNSR (High) & MFF (warning lamp flashes: 97) Generation condition



Diesel particulate filter differential pressure sensor voltage is at or above the specified value (4.87 V). (Diesel particulate filter pressure difference exceeds the specified value to the positive side.)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Diesel particulate filter pressure difference measurement is disabled (operations are continued with pressure difference between before and after ceramic filter in diesel particulate filter fixed at 0 kPa). • Function for calculating the particulate matter (PM) deposit based on exhaust gas pressure is disabled.



Service data Inspection



Electronic control unit connector



01



: Diesel particulate filter differential pressure sensor



Electrical equipment



#334: Diesel particulate filter differential pressure sensor



Electric circuit diagram



Diesel particulate filter differential pressure sensor system



DPF: Diesel particulate filter



15-68



11: Difference pressure across DPF



15 4. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No. Item 0F Exhaust gas temperature 1 10 Exhaust gas temperature 2



Data °C °C



11 Difference pressure across DPF



.



kPa



12 Exhaust gas pressure



.



kPa



21 Catalyst Temp SNSR 29 Catalyst Temp SNSR Voltage



2B Exhaust gas pressure



2C



2D



°C .



.



Exhaust gas temp SNSR1 Voltage



.



Exhaust gas temp SNSR2 Voltage



.



74 DPF SW



ON/OFF



8C DPF Indicator Lamp



ON/OFF



mV



mV



mV



mV



Inspection condition During warm-up During warm-up No-load running at maximum speed after diesel particulate filter regeneration is completed No-load running at maximum speed after diesel particulate filter regeneration is completed During warm-up Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground Sensor circuit open-circuited or shorted to power supply Sensor circuit shorted to ground Diesel particulate filter cleaning switch ON Diesel particulate filter cleaning switch OFF [Actuator test] A2: DPF Regeneration During diesel particulate filter parked regeneration Except above [Actuator test] AF: DPF Indicator Lamp



Requirement Gradually increased Gradually increased 7.5 kPa or lower



107.5 kPa or lower Gradually increased Approx. 5000 mV Approx. 0 mV Approx. 5000 mV Approx. 0 mV Approx. 5000 mV Approx. 0 mV Approx. 5000 mV Approx. 0 mV ON OFF



ON OFF



5. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



Item



Description



Check method



A2 DPF Regeneration



• Check that diesel particulate filter indicator lamp Request is output for diesel particulate filter parked regeneraflickers tion • Diesel particulate filter [Can be executed under following conditions] parked regeneration • Vehicle: stationary (vehicle speed 0 km/h) started with diesel par• Starter switch: ON (engine started) ticulate filter cleaning • Engine: Idling switch ON and engine • Parking brake: Vehicle parked (parking brake switch: ON) speed increased. • After engine warm-up [Service data] 74: DPF SW



AF DPF Indicator Lamp



Diesel particulate filter indicator lamp turned ON/OFF [Can be executed under following conditions] • Vehicle: stationary (vehicle speed 0 km/h {0 MPH}) • Starter switch: ON • Engine: Idling • Transmission: neutral or P range



Check that indicator lamp is turned on and off [Service data] 8C: DPF Indicator Lamp



DPF: Diesel particulate filter



15-69



DIESEL PARTICULATE FILTER REGENERATION SYSTEM 6. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 ) correspond to the similarly printed reference number in section “3. Inspections Based on Diagnosis Codes”.



6.1 Electronic control unit connector terminal layout



6.2 Inspection instructions • Some inspections are performed with the connectors removed. Others are performed with the connectors fitted.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes.



Check item



Measurement method



01 Voltage of diesel particulate filter differential pressure sensor



[Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements]



Terminals (+)-(–): A61-A85 • 5V



Terminals (+)-(–): A84-A85 • 1 to 4.5 V



02 Voltage of diesel particulate filter absolute pressure sensor



[Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements]



Terminals (+)-(–): A60-A42 • 5V



Terminals (+)-(–): A8-A42 • 1.875 to 4.5 V



15-70



15 Check item



Measurement method



[Conditions] 03 • Starter switch OFF Resistance of exhaust gas temperature sensor 1 • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A66-A90 • 20°C: 241.8 kΩ • 50°C: 106.2 +74.3 –41.8 kΩ • 100°C: 33.56 +17.60 –10.60 kΩ • 150°C: 13.90 +5.36 –3.60 kΩ • 200°C: 6.896 +2.064 –1.252 kΩ [Conditions] 04 • Starter switch OFF Resistance of exhaust gas temperature sensor 2 • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A39-A68 • 20°C: 241.8 kΩ • 50°C: 106.2 +74.3 –41.8 kΩ • 100°C: 33.56 +17.60 –10.60 kΩ • 150°C: 13.90 +5.36 –3.60 kΩ • 200°C: 6.896 +2.064 –1.252 kΩ 05 Resistance of catalytic temperature sensor



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: B48-B47 • 20°C: 241.8 kΩ • 50°C: 106.2 +74.3 –41.8 kΩ • 100°C: 33.56 +17.60 –10.60 kΩ • 150°C: 13.90 +5.36 –3.60 kΩ • 200°C: 6.896 +2.064 –1.252 kΩ



[Conditions] 06 • Starter switch ON Voltage of diesel particulate filter cleaning switch • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] • With diesel particulate filter cleaning switch ON (during switch being pressed): Corresponding to battery voltage • With diesel particulate filter cleaning switch not pressed: 0 V



15-71



DIESEL PARTICULATE FILTER REGENERATION SYSTEM 7. Inspection of Electrical Equipment #038 Inspection of parking brake switch • Measure continuity between terminals 1 and 2 (body) ground. Pull the parking brake lever



Continuity exists



Release the parking brake lever



Continuity does not exist



• If any fault is found, replace the switch. (See Gr36.)



#089 Inspection of diesel particulate filter cleaning switch Switch position



Terminals with continuity



–



1-8



ON



Night illumination



1-7



(+) 6-2 (–)



• If there is any abnormality, replace the switch.



#334 Inspection of diesel particulate filter pressure sensor



• Apply a 5 volts DC voltage between terminals 1 and 3 of the diesel particulate filter differential pressure sensor. • Apply air pressures to the sensor and measure the sensor output voltage between terminals 1 and 2 (see illustration). Standard value



0 ± 3.5 kPa {0 ± 0.04 kgf/cm2}



1V



100 ± 3.5 kPa {1.020 ± 0.04 kgf/cm2}



4.5 V



• If either measurement is out of specification, replace the sensor.



15-72



15



• Apply a 5 volts DC voltage between terminals 1 and 3 of the diesel particulate filter absolute pressure sensor. • Apply air pressures to the sensor and measure the sensor output voltage between terminals 1 and 2 (see illustration). Standard value



–41 ± 3.2 kPa {–0.42 ± 0.03 kgf/cm2}



1.875 V



99 ± 3.2 kPa {1.01 ± 0.03 kgf/cm2}



4.5 V



• If either measurement is out of specification, replace the sensor.



#336 Inspection of exhaust gas temperature sensor



• The exhaust gas temperature sensor 1 may output false signals if its tip is contaminated. Clean it if necessary. • Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2.



Standard value



20°C



241.8 kΩ



50°C



106.2 +74.3 –41.8 kΩ



100°C



33.56 +17.60 –10.60 kΩ



150°C



13.90 +5.36 –3.60 kΩ



200°C



6.896 +2.064 –1.252 kΩ



• If either measurement is out of specification, replace the sensor.



• The exhaust gas temperature sensor 2 may output false signals if its tip is contaminated. Clean it if necessary. • Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2.



Standard value



20°C



241.8 kΩ



50°C



106.2 +74.3 –41.8 kΩ



100°C



33.56 +17.60 –10.60 kΩ



150°C



13.90 +5.36 –3.60 kΩ



200°C



6.896 +2.064 –1.252 kΩ



• If either measurement is out of specification, replace the sensor.



15-73



DIESEL PARTICULATE FILTER REGENERATION SYSTEM #338 Inspection of catalytic temperature sensor • The catalytic temperature sensor may output false signals if its tip is contaminated. Clean it if necessary. • Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2.



Standard value



20°C



241.8 kΩ



50°C



106.2 +74.3 –41.8 kΩ



100°C



33.56 +17.60 –10.60 kΩ



150°C



13.90 +5.36 –3.60 kΩ



200°C



6.896 +2.064 –1.252 kΩ



• If either measurement is out of specification, replace the sensor.



15-74



15 8. Installed Locations of Parts



15-75



DIESEL PARTICULATE FILTER REGENERATION SYSTEM



15-76



15



15-77



DIESEL PARTICULATE FILTER REGENERATION SYSTEM



15-78



15



15-79



DIESEL PARTICULATE FILTER REGENERATION SYSTEM



15-80



15 9. Electric Circuit Diagram



15-81



DIESEL PARTICULATE FILTER REGENERATION SYSTEM



15-82



15



15-83



DIESEL PARTICULATE FILTER REGENERATION SYSTEM



15-84



15



15-85



AIR DUCT AND AIR CLEANER



Disassembly sequence 1 2 3 4 5 6 7 8



15-86



Breather hose Air hose Air duct Insulator collar Insulator Air duct bracket A Insulator collar Insulator



9 10 11 12 13 14 15 16



Air duct bracket B Air flow sensor Air duct Air inlet duct A Air inlet duct B Insulator collar Insulator Air inlet duct bracket



17 18 19 20 21 22 23



*a:



Air cleaner cover Dust cover Element Air cleaner case Air cleaner support cushion Air cleaner bracket A Air cleaner bracket B Air inlet coupler



15 Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



3.0 to 3.4 {0.3 to 0.35}



–



Bolt (air cleaner bracket B mounting)



25 to 30 {2.5 to 3.0}



–



Bolt (air cleaner bracket A mounting)



90 to 110 {9.2 to 11.2}



–



12 to 15 {1.2 to 1.5}



–



Bolt (air flow sensor mounting)



1.2 to 1.8 {0.12 to 0.18}



–



Clamp



3.0 to 3.5 {0.3 to 0.36}



–



Clamp



Bolt (air duct mounting) Bolt (air duct bracket A and B mounting) Nut (air cleaner support cushion mounting) Bolt (air inlet duct B mounting) Bolt (air inlet duct bracket mounting)



Cleaning, inspection procedure Cleaning: Element • Blow a jet of compressed air at a pressure not higher than 685 kPa {7 kgf/cm2} against the inside surfaces of the element. • Move the compressed air jet up and down along all pleats of the filter paper element.



CAUTION • For the frequency and timing of cleaning, see the relevant instruction manual. More frequent cleaning than necessary could damage the element or cause dust and foreign matter to be sucked into the engine. • Do not strike the element or hit it against another object to remove dust. • Do not blow compressed air against outside surfaces of the element. Inspection: Element • Shine some electric light inside the element. • Replace the element if thin spots or broken parts are evident in the filter paper, or if the packing at the top of the element is damaged. Also replace the element if the dust on the element is damp with oily smoke or soot, regardless of the replacement schedule.



15-87



AIR DUCT AND AIR CLEANER Installation procedure Installation: Dust cover and air cleaner cover • Install the covers while aligning their respective “ each other as shown in the illustration.



15-88



” marks with



15 M E M O



15-89



TURBOCHARGER



Removal sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 14



15-90



Turbocharger insulator Air hose Air inlet coupler Air inlet hose Air outlet fitting Gasket Front pipe Gasket Turbocharger coupler bracket Turbocharger coupler Gasket Oil return pipe Gasket Eyebolt



15 16 17 18 19 20 21 22 23 24 25



*a::



Water pipe Connector Water pipe Water hose Water hose Eyebolt Oil pipe Eyebolt Water pipe Turbocharger (See later section.) Gasket Exhaust manifold Non-reusable parts



15 Installation sequence Follow the removal sequence in reverse. • After installation, measure and adjust the boost pressure. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Tightening torque (Unit: N·m {kgf·m}) Mark



Tightening torque



Remarks



Clamp



Parts to be tightened



3 to 3.4 {0.3 to 0.35}



–



Clamp



3.9 to 4.9 {0.4 to 0.5}



–



45 to 60 {4.6 to 6.1}



–



Nut (turbocharger coupler mounting)



49 {5.0}



–



Bolt (oil pipe mounting)



8 {0.82}



–



Eyebolt (water pipe mounting)



25 {2.6}



–



Nut (front pipe mounting) Nut (turbocharger mounting)



Eyebolt (oil pipe mounting)



20 {2.0}



–



Connector (water pipe mounting)



93 {9.3}



–



Lubricant and/or sealant Mark



Points of application Pouring into turbocharger



Specified lubricant and/or sealant



Quantity



Engine oil



As required



Installation procedure Installation: Turbocharger • Before installing the turbocharger assembly, pour engine oil into the oil hole to ensure smooth operation of the internal parts.



Installation: Air inlet hose • Fit the air inlet hose over the air outlet fitting as deep as its end touches the buildup on the fitting.



15-91



TURBOCHARGER Turbocharger



Removal sequence 1 2 3 4 5 6 7 8



Snap ring Pin Lever Joint Lock nut Turbocharger actuator Lock nut Position bolt



9 10 11 12 13



Lock plate B Lock plate A Compressor cover O-ring Turbine assembly



: Non-reusable parts



CAUTION • The blades on the turbine assembly are easily bent. Make sure that they do not strike the compressor cover. • The turbine assembly is a non-disassemble component. When it becomes unsmooth in rotation or has a damaged compressor wheel, replace the turbocharger.



NOTE • Do not remove the joint and position bolt from the turbocharger actuator and turbine assembly unless they are defective.



Installation sequence Follow the removal sequence in reverse.



15-92



15 Service standards (Unit: mm) Location



Standard value



Limit



Remedy



2



Pin outer diameter



Maintenance item



φ8



φ7.5



Replace



3



Lever inner diameter



φ8



φ8.5



Replace



4



Joint inner diameter



φ8



φ8.5



Replace



6



Turbocharger actuator shaft stroke



19 to 23



18.4



Replace



13



Play in shaft axis direction of turbine assembly



0.55 to 0.66



0.72



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



21.6 to 23.5 {2.2 to 2.4}



–



Bolt (lock plate A and B mounting)



2.9 to 4.9 {0.3 to 0.5}



Wet



Lock nut



4.9 to 9.8 {0.5 to 1.0}



Wet



Bolt (turbocharger actuator mounting)



Lubricant and/or sealant Mark



Points of application Thread area of bolts Thread area of nuts



Specified lubricant and/or sealant



Quantity



Seizure preventive compound (FEL-PRO CA-5)



As required



Engine oil



As required



O-ring



Work before removal Alignment mark • Put alignment marks on the pin and lever.



CAUTION • Be sure to provide alignment marks on the lever and pin to ensure installation of the pins in right places when reused. Pins in wrong position would change boost pressure to result in a malfunctioning or damaged engine.



Work after disassembly Cleaning • Before cleaning, visually check the disassembled parts for scorches, abrasion and other marks that may be difficult to see after cleaning. Replace any part that appears defective. • Immerse the disassembled parts in a non-flammable solvent (a 5 to 10 aqueous solution of Oil Clean from New Hope Co., Ltd.). Take out the parts and blow them dry with compressed air. Remove any hard deposits with a stiff brush or plastic scraper.



CAUTION • Do not immerse the cartridge assembly in the solvent. Doing so will cause the O-ring inside the cartridge assembly to sell up, which may adversely affect turbocharger operation. • Again, immerse the parts in the solvent. • Blow them dry using compressed air.



15-93



TURBOCHARGER Inspection procedure Inspection: Turbine assembly (1) Visual check • Replace the turbocharger if the compressor cover is damaged or if smooth rotation is not ensured. (2) Play in shaft axial direction • Install the turbine assembly on a flat board with its flanged section pressed against the board. Then, measure the runout using a dial gauge. • If the measurement exceeds the limit, replace the turbine assembly. Inspection: Pin outer diameter • If the measurement is less than the limit, replace the pin.



Inspection: Lever inner diameter • If the measurement exceeds the limit, replace the lever.



Inspection: Joint inner diameter • If the measurement exceeds the limit, replace the joint.



15-94



15 Inspection: Turbocharger actuator shaft stroke • Conduct the turbocharger actuator check with the turbocharger electronic drive unit mounted on the vehicle. • Mark the turbocharger actuator shaft at the zero stroke point. • Select [A5: VGT] from [Actuator Test] on the Multi-Use Tester screen and execute it. The turbocharger actuator shaft will be brought into a full stroke state. • Measure the amount of stroke from the full stroke point to the marked point. • If the measurement is out of specified standard value, replace the turbocharger actuator.



Installation procedure Installation: Position bolt • Move the control crank to the maximum position, and install the position bolt to the turbine assembly. Make sure that the position bolt is in contact with the control crank. • In this state, give the position bolt two and half turns, then tighten the lock nut to secure the position bolt.



Installation: Joint • With the actuator shaft in a zero stroke state, adjust the distance between the end faces of the actuator and joint to the illustrated value. Adjusting guide: 1 mm with one full turn of joint • After the adjustment, tighten the lock nut.



Installation: Pin • Install the pins in the lever according to alignment marks.



CAUTION • Be sure to match the alignment marks to ensure installation of the pins in right places when reused. Pins in wrong position would change the boost pressure to result in a malfunctioning or damaged engine.



15-95



INTERCOOLER



Disassembly sequence 1 2 3 4



5 6 7 8



Air inlet hose Air inlet pipe LH Air inlet hose Air inlet hose



Air inlet pipe RH Air inlet hose Intake air temperature sensor 1 Intercooler



a: *b: *:



Air inlet pipe Air outlet fitting Non-reusable parts



CAUTION • When removing the air inlet hose, do not try to pry it off with strong force using a screwdriver or other similar tools. Doing that can damage the fluoro-layer on the inner surface of the hose, possibly compromising the oil resistance of the hose.



Assembly sequence Follow the disassembly sequence in reverse.



Service standards (Unit: mm) Location 8



15-96



Maintenance item Intercooler air leakage (air pressure: 200 kPa {2.0 kgf/cm2} maintained for 30 seconds)



Standard value



Limit



Remedy



0 cm3 {0 mL}



–



Replace



15 Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Clamp Intake air temperature sensor 1



Tightening torque



Remarks



3.9 to 4.9 {0.4 to 0.5}



–



14.7 to 24.5 {1.5 to 2.5}



–



12 to 15 {1.2 to 1.5}



–



Bolt (intercooler mounting) Bolt (bracket mounting) Nut (bracket mounting)



Inspection procedure Inspection: Air leakage from intercooler • Plug one of the air ports of the intercooler and immerse it in a tank of water. Apply the specified air pressure to the intercooler through the other air port and retain pressure for 30 seconds. • Replace the intercooler if any air leakage is evident.



Installation procedure Installation: Air inlet hose • When connecting the hose to the intercooler, note that the overlap length shown in the illustration must be assured.



Installation: Air inlet hose • Install the air inlet hose so that its paint faces the buildup of the air inlet pipe RH. • Install the air inlet hose to the intercooler, air inlet pipe RH and air outlet fitting to the illustrated dimensions.



15-97



INTERCOOLER • Install the air inlet hose to the air inlet pipe LH with the paint on the hose aligned with the buildup on the pipe. • Install the air inlet hoses to the intercooler and air inlet pipe LH to the illustrated dimensions.



15-98



15 M E M O



15-99



INTAKE MANIFOLD



Disassembly sequence 1 2 3 4 5 6



Intake throttle Gasket Vacuum hose Boost pressure sensor Vacuum hose Vacuum pipe



7 8 9 10



Gas filter Air inlet pipe O-ring Intake air temperature sensor 2 11 Intake manifold



12 Gasket : Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (boost pressure sensor mounting) Gas filter Intake air temperature sensor 2



15-100



Tightening torque



Remarks



4 to 6 {0.4 to 0.6}



–



14.7 to 19.6 {1.5 to 2.0}



–



25 ± 5 {2.5 ± 0.5}



–



15 Inspection procedure Inspection: Intake air temperature sensor 2 • Check that the sensor portion is free of soot, oily substance, etc. • If necessary, clean the sensor portion as follows. • Spray a cleaner on the sensor portion from 2 to 3 cm away. Recommended cleaners: Nonchlorinated solvent. • In 20 to 30 seconds after spraying, wipe the sensor portion clear of the sprayed cleaner using a soft waste cloth or the like.



CAUTION • Be sure to wait for 20 to 30 seconds before wiping. It takes the cleaner that long to dissolve foreign matter. • If the sensor portion is fouled excessively, the positive crankcase ventilation (PCV) may be faulty. Inspect the PCV valve and breather to locate the cause and remove it. (See Gr17.)



Installation procedure Installation: Gasket • Install the gasket on the cylinder head in the illustrated direction.



15-101



EXHAUST MANIFOLD Disassembly sequence 1 2 3 4 5



Exhaust insulator Exhaust gas recirculation pipe Gasket Exhaust manifold Gasket



: Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (exhaust gas recirculation pipe mounting) Nut (exhaust manifold mounting)



Tightening torque



Remarks



23.8 {2.4}



–



30 {3.1}



–



Installation procedure Installation: Gasket • Install the gasket on the cylinder head in the illustrated direction.



15-102



15 M E M O



15-103



EXHAUST PIPE



Removal sequence 1 2 3 4 5



Brace bracket Front pipe Gasket Exhaust shutter (See later section.) Gasket



6 Front pipe 7 Gasket



*a:



Turbocharger coupler : Non-reusable parts



CAUTION • Loosen the



marked bolt first to prevent undue forces from being applied to the front pipe.



Installation sequence Follow the removal sequence in reverse.



CAUTION • Tighten the



marked bolt last to prevent undue forces from being applied to the front pipe.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



Nut (front pipe mounting)



45 to 60 {4.6 to 6.1}



–



Bolt (exhaust shutter mounting)



25 to 28 {2.5 to 2.9}



–



Bolt (brace bracket clamp mounting)



21 to 31 {2.1 to 3.1}



–



Special tools Mark



Tool name and shape



Vacuum pump kit



15-104



Part No.



MH063724



Application



Removal and installation of exhaust shutter



15 Removal procedure Removal: Exhaust shutter • Attach to the power chamber of the exhaust shutter. • Apply some load to the exhaust shutter using to remove the shutter.



Installation procedure Installation: Exhaust shutter • Attach to the power chamber of the exhaust shutter. • Apply some load to the exhaust shutter using to install the shutter.



Installation: Front pipe • Install the front pipe so that the amounts of offset in both vertical and horizontal directions between the pipes in front of and behind the bellows are within the specified value.



CAUTION • The function of the bellows on the front pipe is to reduce the vehicle noise level. It is not intended for compensating for misalignment that may result from improper installation of the front pipe. Install the front pipe properly to avoid excessive tension or other stress on the bellows.



15-105



EXHAUST PIPE Exhaust Shutter



Disassembly sequence 1 Cover 2 Exhaust shutter • The exhaust shutter cannot be disassembled. Replace the exhaust shutter as a unit if any damage is found on the power chamber or other component parts.



Assembly sequence Follow the disassembly sequence in reverse.



Service standards (Unit: mm) Location



Maintenance item



–



When butterfly valve is fully closed (negative pressure for inspection: at least Clearance between butter- 87 to 93 kPa {650 to 700 mmHg}) fly valve and body (average clearance between top When butterfly valve is half and bottom) closed (negative pressure for inspection: 51 kPa {380 mmHg} and 55 kPa {410 mmHg})



–



Air-tightness of power chamber (at 15 sec. after vacuum of 93 kPa {698 mmHg} is achieved in chamber)



Standard value



Limit



Remedy



0.10 to 0.25



–



Replace



0.60 to 0.75



–



Replace



Negative pressure: 90 kPa {675 mmHg} or above



–



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (cover mounting)



Tightening torque



Remarks



4.9 to 6.9 {0.5 to 0.7}



–



Special tools Mark



Tool name and shape



Vacuum pump kit



15-106



Part No.



MH063724



Application



Inspection of power chamber



15 Inspection procedure Inspection: Exhaust shutter (1) Air tightness of power chamber • Apply the negative pressure for inspection to the power chamber using . • After elapse of 15 seconds, check that the vacuum gauge reading meets with the specified value. • If the measurement deviates from the standard value, replace the exhaust shutter.



(2) Clearance between butterfly valve and body (average clearance between top and bottom) (2.1) When the butterfly valve is fully closed • Apply the negative pressure for inspection to the power chamber. Measure the clearance between the butterfly valve and body at the top A and that at the bottom B with the butterfly valve fully closed. Calculate the average clearance. Clearance =



(A + B) 2



• If the measurement deviates from the standard value, replace the exhaust shutter. (2.2) When the butterfly valve is fully opened • Check to ensure that there is no clearance between the lever and adjusting bolt and that the butterfly valve is kept fully open. • If there is any abnormality, replace the exhaust shutter.



(2.3) When the butterfly valve is half closed • Apply the negative pressure for inspection to the power chamber. Measure the clearance between the butterfly valve and body at the top A and that at the bottom B with the butterfly valve half closed. Calculate the average clearance. Clearance =



(A + B) 2



CAUTION • Be sure to take measurements after the butterfly valve is brought once in fully open position and then placed in half closed position. Never take measurements on butterfly valve which is brought in half closed position from the fully closed position. • If the measurement deviates from the standard value, replace the exhaust shutter.



15-107



EXHAUST PIPE (3) Inspection of body inside • Check that the body inside is not sooted. • Clean the body if any soot accumulation is found.



15-108



15 M E M O



15-109



DIESEL PARTICULATE FILTER



Removal sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17



Pressure hose Pressure pipe Pressure hose Pressure pipe Pressure hose Pressure pipe DPF differential pressure sensor DPF absolute pressure sensor Exhaust gas temperature sensor 1 Catalytic temperature sensor Exhaust gas temperature sensor 2 Rear oxidation catalyst (See later section.) Gasket DPF band DPF (See later section.) Gasket Bracket



18 19 20 21 22 23 24 25 26 27 28 29 30



Stay Cushion rubber Cap Cushion rubber Collar Bracket Cap Cushion rubber Collar Bracket Cushion rubber Bracket Bracket



*a::



Front pipe Non-reusable parts DPF: Diesel Particulate Filter



NOTE • The color of the diesel particulate filter surface may turn brown. This discoloration is due to the inherent characteristics of stainless steel and does not indicate rusting or any other abnormality.



15-110



15 Installation sequence Follow the removal sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Pressure pipe Nut (rear oxidation catalyst mounting) Nut (front pipe mounting) Nut (diesel particulate filter band mounting) Bolt (bracket mounting)



Tightening torque



Remarks



40 {4.0}



–



26 to 33 {2.7 to 3.2}



–



45 to 55 {4.5 to 5.6}



–



49 to 63.7 {5.0 to 6.4}



–



Inspection procedure Inspection: Pressure pipe and pressure hose • Check the pressure pipe and hose for clogging by blowing compressed air into the pipe and hose.



CAUTION • Inspection must be performed on an individual pressure pipe or hose. • If compressed air is blown into the pressure pipe or hose with diesel particulate filter sensor still installed, the sensor may become damaged. Inspection: Diesel particulate filter • Check the exhaust passage inside the diesel particulate filter for adhesion of soot in large quantity. • If large amounts of soot are found, replace the diesel particulate filter because broken ceramic filter is suspected.



Inspection: Catalytic temperature sensor, exhaust gas temperature sensor • Check that the sensor portion is free of soot, oily substance, etc. • If necessary, clean the sensor portion as follows. • Spray a cleaner on the sensor portion from 2 to 3 cm away. Recommended cleaners: Nonchlorinated solvent. • In 20 to 30 seconds after spraying, wipe the sensor portion clear of the sprayed cleaner using a soft waste cloth or the like.



CAUTION • Be sure to wait for 20 to 30 seconds before wiping. It takes the cleaner that long to dissolve foreign matter.



15-111



DIESEL PARTICULATE FILTER Installation procedure Installation: Rear oxidation catalyst • Screw the nut A onto the shorter threaded side of the stud bolt until it cannot be turned any more. • Insert the stud bolt with nut A attached into position from the diesel particulate filter side. Fit the gasket and the rear catalyst and tighten the nut B to the specified torque.



15-112



15 Diesel Particulate Filter



Disassembly sequence 1 2 3 4 5



Inlet body Gasket Outlet body Gasket Filter body



a: *b: *



Front oxidation catalyst Ceramic filter : Non-reusable parts



Assembly sequence Follow the disassembly sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (inlet body mounting) Bolt (outlet body mounting)



Tightening torque



Remarks



49 to 63.7 {5.0 to 6.4}



–



Inspection procedure Inspection: Inlet body • Inspect the front oxidation catalyst of inlet body visually. • Replace the inlet body if any abnormalities such as break are found. Inspection: Outlet body • Check the inside the outlet body for adhesion of soot in large quantity. • If a large amount of soot accumulation is found, perform exhaust gas checks because faulty engine parts are suspected. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) Inspection: Filter body • Check the ceramic filter for damage from the rear of the filter body. • If any fault is found, replace the filter body. • Clean the filter body if the ceramic filter is dirty even if no abnormalities are found. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



15-113



REAR OXIDATION CATALYST



Removal sequence 1 2 3 4



Suspender Exhaust hanger Rear oxidation catalyst Gasket



*a: *b::



Diesel particulate filter Rear oxidation catalyst Non-reusable parts



Installation sequence Follow the removal sequence in reverse.



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Nut (rear oxidation catalyst mounting)



15-114



Tightening torque



Remarks



26 to 33 {2.7 to 3.4}



–



15 Installation procedure Installation: Rear oxidation catalyst • Screw the nut A onto the shorter threaded side of the stud bolt until it cannot be turned any more. • Insert the stud bolt with nut A attached into position from the diesel particulate filter side. Fit the gasket and the rear catalyst and tighten the nut B to the specified torque.



15-115



GROUP 17 EMISSION CONTROL STRUCTURE AND OPERATION 1. Exhaust Gas Recirculation System ............................................... 17-2 2. Blowby Gas Return System .......................................................... 17-7



TROUBLESHOOTING ........................................................................ 17-8 EXHAUST GAS RECIRCULATION SYSTEM 1. Diagnosis Procedure .................................................................. 17-10 2. Diagnostic Precautions .............................................................. 17-10 3. Inspections Based on Diagnosis Codes ......................................17-11 4. Multi-Use Tester Service Data ..................................................... 17-18 5. Actuator Tests Performed Using Multi-Use Tester....................... 17-18 6. Inspections Performed at Electronic Control Unit Connectors.... 17-19 7. Inspection of Electrical Equipment ............................................. 17-20 8. Installed Locations of Parts ........................................................ 17-22 9. Electric Circuit Diagram .............................................................. 17-28 EXHAUST GAS RECIRCULATION VALVE, PIPE AND COOLER .. 17-32 BLOWBY GAS RETURN SYSTEM .................................................. 17-34



17-1



STRUCTURE AND OPERATION 1. Exhaust Gas Recirculation System 1.1 Overview • In the exhaust gas recirculation system, the engine electronic control unit and multiple electronic drive units control the exhaust gas recirculation valve and intake throttle in accordance with information from sensors on various aspects of the engine (engine speed, intake air quantity, coolant temperature, throttle opening, etc.). • Exhaust gas recirculation involves the introduction of inert gases in the post-combustion exhaust emissions into the intake manifold. By reducing the combustion temperature, it reduces the amount of nitrogen oxides (NOx), which are harmful, in the exhaust emissions. Further, an exhaust gas recirculation cooler cools the recirculated exhaust emissions, thereby reducing the peak combustion temperature. • The intake air quantity is adjusted by means of intake throttle control such that the effectiveness of exhaust gas recirculation is maximized.



17-2



17 1.2 Electronic control system (1) System block diagram



Part



Main function/operation



Engine speed sensor



Sensing of engine speed



Cylinder recognition sensor



Cylinder recognition



Water temperature sensor



Sensing of coolant temperature



Accelerator pedal position sensor



Sensing of extent of accelerator pedal depression



Intake air temperature sensor 1



Sensing of intake air temperature



Intake air temperature sensor 2



Sensing of boost air temperature



Boost pressure sensor



Sensing of boost pressure



Air flow sensor



Sensing of intake air flow rate



Engine warning lamp



Indication of system abnormalities



EDU relay



Switching ON/OFF supply of power to exhaust gas recirculation electronic drive unit, throttle and turbocharger electronic drive unit



CAN communication (EGR EDU, Throttle EDU)



Engine data recognized by the engine electronic control unit are outputted to the CAN bus to enable systems to obtain data that they need for control. Each electronic drive unit issues signals to the engine electronic control unit via the CAN bus to enable it to effect engine control appropriate for each type of system control.



CAN: Controller area network EGR: Exhaust gas recirculation EDU: Electronic drive unit



17-3



STRUCTURE AND OPERATION (2) Exhaust gas recirculation valve control function • In accordance with data from sensors, the engine electronic control unit determines the exhaust gas recirculation valve opening that suits the operating condition and sends a control signal (this indicates the target exhaust gas recirculation valve opening) to the exhaust gas recirculation electronic drive unit. When necessary to prevent black smoke emissions and engine speed instability (for example, when the engine is heavily loaded, when the engine is lightly loaded, and when the exhaust brake is operating), the engine electronic control unit stops exhaust gas recirculation valve control. (2.1) Exhaust gas recirculation electronic drive unit • The exhaust gas recirculation electronic drive unit activates the exhaust gas recirculation valve motor. At the same time, it monitors the extent of valve lift using a position sensor and sends this information (this indicates the actual exhaust gas recirculation valve opening) to the engine electronic control unit. This operation makes it possible for the target exhaust gas recirculation valve opening indicated by the engine electronic control unit to be precisely maintained.



(2.2) Exhaust gas recirculation valve • Exhaust gas recirculation valve is used to mix exhaust gas flowing in the exhaust manifold into intake air flowing in the intake manifold. • Exhaust gas recirculation valve incorporates a motor to open and close the valve and a position sensor to detect the lift amount of the valve. • DC motor in the exhaust gas recirculation valve is driven by control signals from the exhaust gas recirculation electronic drive unit. Via a rod, the motor’s operation opens and closes the valve.



(3) Intake throttle control function • When the engine electronic control unit determines from sensor data on the engine speed and engine loading that the vacuum pressure in the intake manifold is low, it increases the amount of exhaust emissions introduced into the intake manifold by determining an appropriate butterfly valve opening and by sending corresponding control signals (these indicate the target throttle opening) to the throttle electronic drive unit. (3.1) Throttle electronic drive unit • The throttle electronic drive unit activates the valve motor. At the same time, it monitors the valve opening using a position sensor and sends this information (this indicates the actual throttle opening) to the engine electronic control unit. This operation makes it possible for the target throttle opening indicated by the engine electronic control unit to be precisely maintained.



17-4



17 (3.2) Intake throttle • In accordance with signals from the throttle electronic drive unit, the motor opens and closes the butterfly valve, thereby adjusting the intake air amount such that the effectiveness of exhaust gas recirculation is maximized.



(4) Fault diagnosis function • The engine electronic control unit continuously monitors the electronic drive units and sensors for faults. In the event that the engine electronic control unit finds a component faulty, it causes an indication to be made in the meter cluster to alert the driver. At the same time, it memorizes the fault location in the form of a diagnosis code and starts a control during fault. • While the engine is running, the exhaust gas recirculation electronic drive unit and throttle electronic drive unit continuously monitor communication with the position sensor and motor of the exhaust gas recirculation valve, communication with the position sensor and motor of the throttle actuator, and communication with the engine electronic control unit. In the event that they identify a fault, they send fault data to the engine electronic control unit. • While control necessitated by a fault is taking place, the system’s functionality is limited to ensure vehicle and driver safety. It is possible to read the memorized diagnosis code using a Multi-Use Tester or from flashing of the warning lamp. (See Gr00.)



17-5



STRUCTURE AND OPERATION 1.3 Electronic control unit connection diagram



17-6



17 2. Blowby Gas Return System



• The crankcase emission control system returns blowby gases to an air hose to prevent them from being released to the outside air. • The positive crankcase ventilation valve keeps constant the pressure inside the crankcase.



17-7



TROUBLESHOOTING



Engine output is limited due to faulty exhaust gas recirculation system Exhaust gas recirculation valve Exhaust gas recirculation cooler Exhaust gas recirculation pipe



O O



O



Exhaust gas recirculation cooler improperly mounted



O



Defective gasket



O



Leakage from exhaust gas recirculation cooler



O



Exhaust gas recirculation pipe improperly mounted



O



Exhaust gas recirculation pipe broken



O



Defective gasket



Defective positive crankcase ventilation valve Leakage from positive crankcase ventilation hose



17-8



O



Exhaust gas recirculation valve improperly mounted Exhaust gas recirculation valve malfunction



Exhaust gas recirculation system is abnormal



Overheating (poor cooling)



Abnormal noise or vibration of exhaust system



Possible causes



Excessive white smoke



Excessive black smoke



Symptoms



O O O



Reference Gr



17 M E M O



17-9



EXHAUST GAS RECIRCULATION SYSTEM 1. Diagnosis Procedure • Carry out system inspection in accordance with the flow chart given below. Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Clear stored diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition. • To start the engine, be sure to connect the connector of the MPROP (rail pressure control valve) to the engine harness. If the engine is started without connecting the MPROP connector, the engine electronic control unit cannot control the supply pump and the fault of the engine may result. • If the electronic control unit is replaced with a new one, some data must be registered in the new electronic control unit for proper engine control. This also applied to the case when replacing the electronic control unit with the one that has been used in other vehicle. (See Gr13.)



17-10



17 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • The Multi-Use Tester is capable of showing more detailed diagnosis codes. • The control during fault recovers by servicing the faults. However, for some diagnosis codes, the warning lamp stays illuminated until the normal signals are input for several times. Code



Message



Warning lamp indication Flashes



Orange



Red



P0097



INT Air Temp Sensor 2 (Low)



9



O



–



P0098



INT Air Temp Sensor 2 (High)



9



O



–



P0102



Airflow Sensor (Low)



17



O



–



P0103



Airflow Sensor (High)



17



O



–



P0112



INT Air Temp SNSR (Low)



44



O



–



P0113



INT Air Temp SNSR (High)



44



O



–



P0226



Throttle Valve Position



28



O



–



P0403



EGR1 (Actuator Circuit)



2



O



–



P0404



EGR System



67



O



–



P0409



EGR1 (Position Sensor)



67



O



–



P0489



EGR Power Supply



67



O



–



P0490



EGR Power Supply



67



O



–



P0685



EDU Relay (Open)



84



O



–



P0686



EDU Relay (Low)



84



O



–



P0687



EDU Relay (High)



84



O



–



P0688



EDU Relay (Over Load)



84



O



–



P1632



CAN (EGR Time Out)



95



O



–



P1635



CAN (Intake Throttle)



96



O



–



P2100



TVA (Open)



28



O



–



P2101



TVA (System)



28



O



–



P2102



TVA (Short)



28



O



–



P2108



TVA (Controller)



96



O



–



P2135



TVA SNSR (Voltage)



28



O



–



P2413



EGR System



67



O



–



3.2 Diagnosis code generation conditions and inspection items P0097: INT Air Temp Sensor 2 (Low) (warning lamp flashes: 9) Generation condition



Intake air temperature sensor 2 voltage remains less than 0.15 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Backup value (25°C) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Service data Inspection



Electronic control unit connector



27: Intake Air Temp SNSR 2 Voltage 04



: Intake air temperature sensor 2



Electrical equipment



#304: Intake air temperature sensor 2



Electric circuit diagram



Intake air temperature sensor 2 system



17-11



EXHAUST GAS RECIRCULATION SYSTEM P0098: INT Air Temp Sensor 2 (High) (warning lamp flashes: 9) Generation condition



Intake air temperature sensor 2 voltage remains higher than 4.8 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Backup value (25°C) is used. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Service data Inspection



Electronic control unit connector



27: Intake Air Temp SNSR 2 Voltage 04



: Intake air temperature sensor 2



Electrical equipment



#304: Intake air temperature sensor 2



Electric circuit diagram



Intake air temperature sensor 2 system



P0102: Airflow Sensor (Low) (warning lamp flashes: 17) Generation condition



Airflow sensor voltage remains less than 1.1 V (intake air flow rate: 1.4 g/s) for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Carries out control using a backup value (Fix the intake air flow rate at 8.3 g/ s.). • Diesel particulate filter regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



16: Air mass flow



Electrical equipment



#306: Air flow sensor



Electric circuit diagram



Air flow sensor system



P0103: Airflow Sensor (High) (warning lamp flashes: 17) Generation condition



Airflow sensor voltage remains higher than 4.7 V (intake air flow rate: 269.4 g/s) for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Carries out control using a backup value (Fix the intake air flow rate at 8.3 g/ s.). • Diesel particulate filter regeneration control is stopped. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



16: Air mass flow



Electrical equipment



#306: Air flow sensor



Electric circuit diagram



Air flow sensor system



P0112: INT Air Temp SNSR (Low) (warning lamp flashes: 44) Generation condition



Intake air temperature sensor 1 voltage remains less than 0.15 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Backup value (25°C) is used.



Service data Inspection



17-12



Electronic control unit connector



0D: Intake Air Temperature 1, 28: Intake Air Temp SNSR1 Voltage 03



: Intake air temperature sensor 1



Electrical equipment



#305: Intake air temperature sensor



Electric circuit diagram



Intake air temperature sensor 1 system



17 P0113: INT Air Temp SNSR (High) (warning lamp flashes: 44) Generation condition



Intake air temperature sensor 1 voltage remains higher than 4.87 V for 3 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



Backup value (25°C) is used.



Service data Inspection



Electronic control unit connector



0D: Intake Air Temperature 1, 28: Intake Air Temp SNSR1 Voltage 03



: Intake air temperature sensor 1



Electrical equipment



#305: Intake air temperature sensor



Electric circuit diagram



Intake air temperature sensor 1 system



P0226: Throttle Valve Position (warning lamp flashes: 28) Generation condition



Throttle electronic control unit detects abnormality in intake throttle position sensor voltage or in target degree of throttle opening.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Actuator tests “A4: Intake Throttle 1” is stopped.



Inspection



Electrical equipment



#306: Air flow sensor



Electric circuit diagram



Intake throttle system



P0403: EGR 1 (Actuator Circuit) (warning lamp flashes: 2) Generation condition



Exhaust gas recirculation electronic drive unit has judged that exhaust gas recirculation valve motor was faulty.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



06: EGR Position



Actuator test



A1: EGR



Electrical equipment



#530: Exhaust gas recirculation valve



Electric circuit diagram



Exhaust gas recirculation system



P0404: EGR System (warning lamp flashes: 67) Generation condition



Exhaust gas recirculation electronic control unit fails in initialization of exhaust gas recirculation valve (initialization takes place each time the engine is started).



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Diesel particulate filter regeneration control is stopped.



Inspection



Service data



06: EGR Position



Actuator test



A1: EGR



Electrical equipment



#530: Exhaust gas recirculation valve



Electric circuit diagram



Exhaust gas recirculation system



17-13



EXHAUST GAS RECIRCULATION SYSTEM P0409: EGR 1 (Position Sensor) (warning lamp flashes: 67) Generation condition



Exhaust gas recirculation electronic drive unit judges exhaust gas recirculation position sensor faulty.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Exhaust gas recirculation valve control is stopped.



Inspection



Service data



06: EGR Position



Actuator test



A1: EGR



Electrical equipment



#530: Exhaust gas recirculation valve



Electric circuit diagram



Exhaust gas recirculation system



P0489: EGR Power Supply (warning lamp flashes: 67) Generation condition



Exhaust gas recirculation valve power supply voltage remains less than 13 V for 2 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



1D: Power Supply Voltage



Electrical equipment



#530: Exhaust gas recirculation valve, #860: Battery



Electric circuit diagram



Exhaust gas recirculation relay and battery system



P0490: EGR Power Supply (warning lamp flashes: 67) Generation condition



Exhaust gas recirculation valve power supply voltage remains higher than 35 V for 2 seconds.



Recoverability



System recovers if signal becomes normal with starter switch in ON position for 1 second.



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



1D: Power Supply Voltage



Electrical equipment



#530: Exhaust gas recirculation valve



Other



Alternator (See Gr54.)



P0685: EDU Relay (Open) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay open-circuited.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Diesel particulate filter regeneration control is stopped. • Throttle control is stopped.



Inspection



17-14



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Electronic control unit connector



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



17 P0686: EDU Relay (Low) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay circuit shorted to ground.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Diesel particulate filter regeneration control is stopped. • Throttle control is stopped.



Inspection



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Electronic control unit connector



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P0687: EDU Relay (High) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay circuit shorted to power source.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Diesel particulate filter regeneration control is stopped. • Throttle control is stopped.



Inspection



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Electronic control unit connector



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P0688: EDU Relay (Over Load) (warning lamp flashes: 84) Generation condition



Electronic drive unit relay over loaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Diesel particulate filter regeneration control is stopped. • Throttle control is stopped.



Inspection



Service data



89: EDU Power Relay



Actuator test



AD: EDU Relay



Electronic control unit connector



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay



Electric circuit diagram



Electronic drive unit relay system



P1632: CAN (EGR Time out) (warning lamp flashes: 95)



Generation condition



No controller area network signal from exhaust gas recirculation electronic drive unit is received for 1 second. Diagnosis code P1635, P1645 or U0073 may occur simultaneously (if these diagnosis codes occur at the same time, possibility is high that harness somewhere near engine electronic control unit is faulty)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



06: EGR Position



Actuator test



A1: EGR, AD: EDU Relay



Electronic control unit connector



01



: Controller area network resistor,



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay, #828: Controller area network resistor



Electric circuit diagram



Controller area network communication between engine electronic control unit and exhaust gas recirculation electronic drive unit, exhaust gas recirculation electronic drive unit power system



17-15



EXHAUST GAS RECIRCULATION SYSTEM P1635: CAN (Intake Throttle) (warning lamp flashes: 96)



Generation condition



No controller area network signals from throttle electronic drive unit are received for 1 second. Diagnosis code P1632, P1645 or U0073 may occur simultaneously (if these diagnosis codes occur at the same time, possibility is high that harness somewhere near engine electronic control unit is faulty)



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• • • •



Inspection



Exhaust gas recirculation valve control is stopped. Diesel particulate filter regeneration control is stopped. Throttle control is stopped. Actuator tests “A4: Intake Throttle 1” is stopped.



Service data



07: Intake Throttle Position



Actuator test



AD: EDU Relay



Electronic control unit connector



01



: Controller area network resistor,



02



: Electronic drive unit relay



Electrical equipment



#201: Electronic drive unit relay, #828: Controller area network resistor



Electric circuit diagram



Controller area network communication between engine electronic control unit and throttle electronic drive unit, throttle electronic drive unit power system



P2100: TVA (Open) (warning lamp flashes: 28) Generation condition



When throttle electronic drive unit detects either of the following signals • Throttle electronic drive unit circuit shorted to ground. • Motor coil (inside intake throttle) shorted to ground.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Actuator tests “A4: Intake Throttle 1” is stopped.



Service data Inspection



07: Intake Throttle Position



Actuator test



A4: Intake Throttle 1



Electrical equipment



#529: Intake throttle



Electric circuit diagram



Intake throttle system



P2101: TVA (System) (warning lamp flashes: 28) Generation condition



When throttle electronic drive unit detects either of the following signals • Intake throttle circuit open-circuited. • Motor coil (inside intake throttle) open-circuited or overloaded.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Actuator tests “A4: Intake Throttle 1” is stopped.



Inspection



17-16



Service data



07: Intake Throttle Position



Actuator test



A4: Intake Throttle 1



Electrical equipment



#529: Intake throttle



Electric circuit diagram



Intake throttle system



17 P2102: TVA (Short) (warning lamp flashes: 28) Generation condition



When throttle electronic drive unit detects either of the following signals • Intake throttle circuit shorted to power supply. • Motor coil (inside intake throttle) shorted.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Actuator tests “A4: Intake Throttle 1” is stopped.



Service data Inspection



07: Intake Throttle Position



Actuator test



A4: Intake Throttle 1



Electrical equipment



#529: Intake throttle



Electric circuit diagram



Intake throttle system



P2108: TVA (Controller) (warning lamp flashes: 96) Generation condition



When throttle electronic drive unit detects either of the following signals • Intake throttle circuit shorted to power supply. • Motor coil (inside intake throttle) shorted.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control is stopped. • Actuator tests “A4: Intake Throttle 1” is stopped.



Inspection



Service data



07: Intake Throttle Position



Electrical equipment



#529: Intake throttle



Electric circuit diagram



Intake throttle system



P2135: TVA SNSR (Voltage) (warning lamp flashes: 28) Generation condition



Throttle electronic drive unit judges throttle position sensor power abnormal.



Recoverability



System recovers if any valid signal is input when starter switch is turned from OFF to ON (the warning lamp does not go out unless 3 consecutive valid signals are input).



Control effected by electronic control unit



• Injection quantity is limited. • Exhaust gas recirculation valve control is stopped. • Throttle control is stopped.



Inspection



Service data



07: Intake Throttle Position



Actuator test



A4: Intake Throttle 1



Electrical equipment



#529: Intake throttle



Electric circuit diagram



Intake throttle system



P2413: EGR System (warning lamp flashes: 67)



Generation condition



When either of the following signals is received from exhaust gas recirculation electronic drive unit for 2 seconds • Target exhaust gas recirculation valve opening calculated by engine electronic control unit deviates from the specified limit. • No target valve opening signal is sent from engine electronic control unit.



Recoverability



System recovers if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



• Exhaust gas recirculation valve control is stopped. • Throttle control valve is stopped.



Inspection



Service data



06: EGR Position



Actuator test



A1: EGR



Electrical equipment



#530: Exhaust gas recirculation valve



Electric circuit diagram



Exhaust gas recirculation system



17-17



EXHAUST GAS RECIRCULATION SYSTEM 4. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No.



Item



Data



Inspection condition



Requirement



06 EGR Position



.



%



Idling



0%



07 Intake Throttle Position



.



%



Idling



90%



Equal to ambient temperature Equal to ambient temperaIntake Air Temperature 2 On a cold engine . °C ture Flow rate to be increased . g/s Air mass flow Accelerator pedal is pressed gradually. accordingly Value matches battery volt. V Power Supply Voltage Starter switch ON age Sensor circuit open-circuited or shortApprox. 5000 mV ed to power supply Intake Air Temp SNSR2 Voltage . mV Sensor circuit shorted to ground Approx. 0 mV Sensor circuit open-circuited or shortApprox. 5000 mV ed to power supply Intake Air Temp SNSR1 Voltage . mV Sensor circuit shorted to ground Approx. 0 mV Starter switch ON ON ON/OFF EDU Power Relay Starter switch OFF OFF [Actuator test] Ac: EDU relay



0D Intake Air Temperature 1 0E 16 1D 27



28



89



.



°C



On a cold engine



5. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



Item



Explanation



Confirmation method



A1 EGR



Check that the EGR valve Maintain exhaust gas recirculation valve opening indicated opening is changed. by Multi-Use Tester during engine operation. [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON (engine started) • Transmission: neutral • Diagnosis switch: OFF (with fuse removed)



A4 Intake Throttle 1



Maintain intake throttle opening indicated by Multi-Use Tester Check that the throttle opening is changed. during engine operation. [Can be executed when the following conditions are satisfied] • Vehicle: stationary (vehicle speed 0 km/h) • Starter switch: ON (engine started) • Transmission: neutral • Diagnosis switch: OFF (with fuse removed)



Ac EDU Relay



Operating sound of relay Electronic drive unit relay drive signal (Errors related to exhaust gas recirculation and to the intake [Service data] throttle can be detected when this actuator test is executed.) 89: EDU Power Relay



17-18



17 6. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 , and so on) correspond to the similarly printed reference number in section “3. Inspections Based on Diagnosis Codes”.



6.1 Electronic control unit connector terminal layout



6.2 Inspection instructions • Some inspections are performed with the connectors removed. Others are performed with the connectors fitted.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes.



Check item 01 Resistance of controller area network resistor



02 Voltage of electronic drive unit relay



Measurement method [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: B5-B6 • 120 ± 6 Ω [Conditions] • Starter switch ON • Vehicle-side harness connected (Perform inspection on back of connector.) [Requirements] Terminals (+)-(–): B39-B14 • With relay operating: Corresponding to battery voltage • With relay not operating: 0 V



17-19



EXHAUST GAS RECIRCULATION SYSTEM 03 Resistance of intake air temperature sensor 1



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: A63-A32 • 0°C: 15 +3.78 –2.94 kΩ • 20°C: 6.514 +1.437 –1.147 kΩ



• 80°C: 0.874 +0.136 –0.115 kΩ 04 Resistance of intake air temperature sensor 2



[Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals: B29-B30 • 0°C: 162.3 +48.8 –36.5 kΩ



• 20°C: 61.47 +15.99 –12.35 kΩ • 80°C: 6.120 +1.095 –0.907 kΩ



7. Inspection of Electrical Equipment #201 Inspection of relay (normally open, 5 pins) • Perform a continuity check and an operation check. If there is any abnormality, replace the relay.



#305 Inspection of air temperature sensor



• Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2. Standard value



0°C



15 +3.78 –2.94 kΩ



20°C



6.514 +1.437 –1.147 kΩ



80°C



0.874 +0.136 –0.115 kΩ



• If either measurement is out of specification, replace the sensor.



• Place the sensor in a container filled with engine oil. • Heat the oil to each of the specified temperatures. Stir the oil well while doing so. • Measure the resistance between terminals 1 and 2. Standard value



0°C



162.3 +48.5 –36.5 kΩ



20°C



61.47 +15.99 –12.35 kΩ



80°C



6.120 +1.095 –0.907 kΩ



• If either measurement is out of specification, replace the sensor.



17-20



17 #529 Inspection of intake throttle • Perform the following checks. If there is any abnormality, replace the intake throttle. (1) Coil resistance of motor • Measure the resistance between terminals 5 and 6. Standard value



0.3 to 80 Ω



NOTE • If the measurement deviates from the standard value, measure the resistance again after manually opening and closing the butterfly valve 5 times. (2) Position sensor • The sensor cannot easily be inspected in isolation, so you must evaluate it indirectly by inspection of system harness and related parts. • If there is no abnormality in any related part but the system is abnormal, replace the intake throttle. #530 Inspection of exhaust gas recirculation valve • Perform the following checks. If there is any abnormality, replace the exhaust gas recirculation valve. (1) Coil resistance of motor • Measure the resistance between terminals 8 and 7, the resistance between terminals 8 and 6, and the resistance between terminals 7 and 6. Standard value



11.3 ± 1.5 Ω



(2) Position sensor • The sensor cannot easily be inspected in isolation, so you must evaluate it indirectly by inspection of system harness and related parts. • If there is no abnormality in any related part but the system is abnormal, replace the exhaust gas recirculation valve. #828 Inspection of controller area network resistor • Measure the resistance between terminals 1 and 2. Standard value (at 20°C)



120 ± 6 Ω



• If the measurement is out of specification, replace the controller area network resistor.



17-21



EXHAUST GAS RECIRCULATION SYSTEM 8. Installed Locations of Parts



17-22



17



17-23



EXHAUST GAS RECIRCULATION SYSTEM



17-24



17



17-25



EXHAUST GAS RECIRCULATION SYSTEM



17-26



17



17-27



EXHAUST GAS RECIRCULATION SYSTEM 9. Electric Circuit Diagram



17-28



17



17-29



EXHAUST GAS RECIRCULATION SYSTEM



17-30



17 M E M O



17-31



EXHAUST GAS RECIRCULATION VALVE, PIPE AND COOLER



Removal sequence 1 2 3 4 5 6 7 8 9



17-32



Water hose Water hose EGR valve EGR valve gasket B EGR valve gasket A EGR pipe B EGR gasket EGR valve bracket EGR pipe insulator A



10 11 12 13 14 15 16 17 18



EGR pipe A EGR pipe gasket EGR gasket Water hose Water hose Starter EGR cooler Eyebolt Fuel pipe



19 20 21 22 23



*a::



Eyebolt Fuel pipe Eyebolt Fuel return pipe EGR cooler bracket



Clutch housing Non-reusable parts EGR: Exhaust gas recirculation



17 • Even when all coolant in the crankcase has been drained out, approximately 0.5 dm3 {0.5 L} of coolant remains in the EGR cooler. Before removing the EGR cooler, make ready a container to catch the coolant.



Installation sequence Follow the removal sequence in reverse.



Service standards Location



Maintenance item



Standard value



Limit



Remedy



0 cm3 {0 mL}



–



Replace



16



Exhaust gas passage side 2 Air leakage of EGR (air pressure: 294 kPa {3 kgf/cm ) cooler Water passage side (air pressure: 196 kPa {2 kgf/cm2)



0 cm3 {0 mL}



–



Replace



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened



Tightening torque



Remarks



47.5 {4.8}



–



23.2 {2.4}



–



14 to 19 {1.4 to 1.9}



–



39 {4.0}



–



Bolt (mounting of EGR valve) Bolt (mounting of EGR valve bracket) Bolt (mounting of EGR pipe B) Bolt (mounting of EGR pipe A) Bolt (mounting of EGR 2) Bolt (mounting of EGR pipe B) Nut (mounting of EGR pipe A) Eyebolt (mounting of fuel pipe) Eyebolt (mounting of suction pipe)



Inspection procedure Inspection: Air leakage of EGR cooler • Perform the following inspection. If any abnormality is found, replace the exhaust gas recirculation cooler. (1) Exhaust gas passage side • Fit a cover over the exhaust gas outlet of the exhaust gas recirculation cooler, and connect a hose to the exhaust gas inlet. Then, submerge the exhaust gas recirculation cooler in a container of water. Make sure the coolant passage is full of water. • Apply specified air pressure through the hose. Check that air does not leak from any part of the exhaust gas recirculation cooler. (2) Coolant passage side • Fit covers over the exhaust gas recirculation cooler’s exhaust gas inlet, exhaust gas outlet, and coolant outlet, and connect a hose to the coolant inlet. Then, submerge the exhaust gas recirculation cooler in a container of water. • Apply specified air pressure through the hose. Check that air does not leak from any part of the exhaust gas recirculation cooler.



17-33



BLOWBY GAS RETURN SYSTEM C



Removal sequence 1 2 3 4 5



*a: *b::



6 O-ring 7 Breather 8 O-ring



Breather hose Hose clip PCV valve O-ring Breather cover



Air hose Timing gear case Non-reusable parts PCV: Positive crankcase ventilation



Installation sequence Follow the removal sequence in reverse.



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



Quantity



Engine oil



–



O-ring



Installation procedure Installation: Hose clip • Install hose clips to the markings on the breather hose.



17-34



17 Installation: Breather hose • Insert the breather hose so that its white paint mark becomes vertical to paint mark on positive crankcase ventilation valve, then connect the hose firmly all the way into the valve.



• Insert the breather hose with its white paint mark opposed to the projection of the air hose, then connect the hose firmly all the way to the spool.



17-35



GROUP 18 HYBRID ELECTRIC VEHICLE SYSTEM SPECIFICATIONS ................................ 18-2 STRUCTURE AND OPERATION 1. Outline ............................................... 18-4 2. Electronic Control System ............ 18-12 3. Electronic Control Unit Connection Diagram ........................................... 18-18



TROUBLESHOOTING



1. Diagnosis Procedure ..................... 18-20 2. Diagnostic Precautions ................. 18-20 3. Inspections Based on Diagnosis Codes .............................................. 18-21 4. Freeze Frame Data of Multi-Use Tester ............................................... 18-32 5. Multi-Use Tester Service Data ....... 18-33 6. Actuator Tests Performed Using Multi-Use Tester .............................. 18-37 7. Inspections Performed at Electronic Control Unit Connectors ............... 18-38 8. Possible Causes of Symptoms ..... 18-39



TROUBLESHOOTING 1. Diagnosis Procedure ..................... 18-40 2. Diagnostic Precautions ................. 18-40



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspection of Coolant Level .......... 2. Inspection of Coolant Leakage ..... 3. Coolant Replacement of High Voltage Cooling System ................ 4. Inspection of Air Filter in High Voltage Battery Box .......................



18-52 18-52 18-53 18-57



HIGH VOLTAGE COOLING SYSTEM ............................................. 18-58 HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT ................................. 18-60 INSPECTION OF ELECTRICAL EQUIPMENT ....................................... 18-68 INSTALLED LOCATIONS OF PARTS ................................................ 18-70 ELECTRIC CIRCUIT DIAGRAM ........ 18-74



3. Inspections Based on Diagnosis Codes .............................................. 18-41 4. Freeze Frame Data of Multi-Use Tester ............................................... 18-48 5. Multi-Use Tester Service Data ....... 18-49 6. Actuator Tests Performed Using Multi-Use Tester .............................. 18-49 7. Inspections Performed at Electronic Control Unit Connectors ............... 18-50 8. Possible Causes of Symptoms ..... 18-51 18-1



SPECIFICATIONS Motor Generator Item



Specification



Manufacturer



MITSUBISHI HEAVY INDUSTRIES



Type



Permanent magnet synchronous



Cooling system



Water cooling



Rated voltage



V



DC350



Maximum output



kW {PS}



35 {48}



Maximum torque



N·m {kgf·m}



200 {20}



Mass



kg



67



High Voltage Battery Box (Battery Electronic Control Unit and High Voltage Battery) Item



Specification



Manufacturer



HITACHI VEHICLE ENERGY



Type



Lithium ion



Number of cells



96 (48 × 2)



Capacity Rated voltage Mass



Ah



5.5



V



DC350 (for motor generator operation) and DC24 (for electronic control unit operation)



kg



89



Motor Electronic Control Unit Item



Specification



Manufacturer



MITSUBISHI HEAVY INDUSTRIES



Rated output current



A



58



Maximum output current



A



175



Rated voltage



V



DC350 (for motor generator operation) and DC24 (for electronic control unit operation)



Blower Motor Item



Specification



Manufacturer



DENSO φ250 × 60F modified



Model Type



Motor specification



DC ferrite



Rated voltage



Fan specification



V



Type



DC24 Axial flow fan



Water Pump Item



Specification



Manufacturer



MIKUNI CORPORATION



Model Rated voltage Operating voltage Quantity of water supply



18-2



CP21A11-01 V A dm3 {L} /min



DC24 1 or less Approx. 15.8 {15.8} or more (at 20 kPa {0.2 kgf/cm2})



18 M E M O



18-3



STRUCTURE AND OPERATION 1. Outline 1.1 Hybrid electric vehicle system



• CANTER ECO HYBRID is a parallel type hybrid electric vehicle system designed to economize fuel consumption and reduce exhaust gas emission by selective or combined use of engine and motor generator according to the running condition of the vehicle. • The motor generator, located in the back of the clutch housing, not only generates motive power but also serves as a dynamo under the control of the motor electronic control unit. • Heated motor generator and the inverter in the motor electronic control unit are cooled with the high voltage cooling system. • The high voltage battery is managed and controlled by the battery electronic control unit. • Torque (drive force) generated by the engine and motor generator is distributed by the INOMAT-II electronic control unit.



18-4



18 • Respective electronic control units, which constantly send and receive input and output data through controller area network communication, take their shares of control to ensure the normal operation of the hybrid electric vehicle system.



1.2 Driving • The engine and motor generator are operated, independently or combined, by the torque (drive force) distribution command of the INOMAT-II electronic control unit in accordance with the vehicle running condition and high voltage battery state of charge. (1) When starting • The motor generator is used to start the vehicle.



(2) When running (high voltage battery state of charge: Normal) • With the clutch engaged, the vehicle runs using the engine only.



(3) When running (high voltage battery state of charge: High) • The engine is assisted by the motor generator.



18-5



STRUCTURE AND OPERATION (4) When running (high voltage battery state of charge: Low) • The motor generator is operated as a dynamo by the engine.



(5) When running (during gear shifting) • The motor generator is used to facilitate the synchronized gear shifting.



(6) When braking • The motor generator is operated as a dynamo to charge the high voltage battery with braking energy regenerated. At the same time, braking force equal to that of engine brake is generated. • When large braking force is required, engine or exhaust braking is activated with the clutch engaged.



18-6



18 1.3 Motor generator and drive line



• The motor generator is located in the back of the clutch housing. • By the command of the motor electronic control unit, direct current high voltage output from the high voltage battery is converted to a three-phase alternating current through the inverter and flows into the stator assembly to produce a magnetic field in it. As a result, the rotor is turned to send the torque (drive force) to the transmission. • During braking, the motor generator operates as a dynamo. The rotor is turned to produce three-phase alternating current in the stator assembly. Three-phase alternating current is converted to direct current high voltage through the inverter to charge the high voltage battery. • The smoothing capacitor in the motor electronic control unit stabilizes direct current high voltage. (1) Drive line (when motor generator operates alone) • The engine is in the idling state with the clutch disengaged. • The motor generator operation drives the drive pinion to run the vehicle. * The illustration at the left outlines the structure and operation of the drive line. For the actual clutch-related operation, see Gr21.



18-7



STRUCTURE AND OPERATION (2) Drive line (when engine operates alone) • The clutch is engaged and engine output torque (drive force) is directly transmitted to the drive pinion.



(3) Drive line (when engine and motor generator operate) • The clutch is engaged and engine output torque (drive force) is transmitted to the drive pinion along with motor generator output torque (drive force).



18-8



18 1.4 High voltage battery box



• The high voltage battery box consists of a high voltage battery, a battery electronic control unit, a junction box, a safety plug, a battery cooling fan and an air filter. • The high voltage battery is composed of two series-connected modules, each module being made up of 48 series-connected cells. • Each module is provided with a cell controller, through which data of each cell is sent to the battery electronic control unit. • The relay for high voltage located in the junction box (with the main contactor (+) and (–)) is energized by the command of the motor electronic control unit to supply electric power to the inverter in the motor electronic control unit. • When the safety plug is disconnected, electric power is cut off. (High voltage still remains in the circuit.) • The battery cooling fan is operated by the command of the battery electronic control unit to discharge heat generated by the high voltage battery to the outside of the high voltage battery box using air taken in through the air filter.



18-9



STRUCTURE AND OPERATION 1.5 High voltage cooling system



• Each high voltage device in the hybrid electric vehicle system is provided with dedicated cooling lines independent from those of the engine. • The high voltage cooling system cools the inverters in the motor generator and motor electronic control unit heated through their operation under high voltage. • The blower motor and water pump are so controlled by the motor electronic control unit that high voltage devices are cooled to the optimal temperature.



18-10



18 M E M O



18-11



STRUCTURE AND OPERATION 2. Electronic Control System 2.1 System block diagram



18-12



18 (1) Motor electronic control unit Part name



Main function or operation



Starter switch ON power supply



Supplies electronic control unit power supply (with starter switch ON)



Starter switch START signal



Detection of cranking (used for engine start function by motor generator, sent to INOMAT-II electronic control unit)



Battery direct power supply



Supplies electronic control unit power supply (continuous)



Hill start assist system operation signal



Hill start assist system operation signal (used for idling stop and start control by INOMAT-II electronic control unit)



Brake fluid pressure sensor



Detection of brake pedal position



Diagnosis switch



Display of diagnosis code



Memory clear switch



Display (past) or erasure of diagnosis code



Inverter



• Converts direct current high voltage from high voltage battery to three-phase alternating current • Converts three-phase alternating current to direct current high voltage



Temperature sensor in inverter



Detection of inverter temperature (measures at three points, i.e., U, V and W phase)



Blower motor



Cools radiator in high voltage cooling system



Water pump



Circulates coolant in high voltage cooling system



Motor generator



• Activated on reception of three-phase alternating current to output torque (drive force) • Operates as a dynamo to generate regenerated force during braking or similar situations



Revolution sensor in motor generator



Detection of motor generator speed



Temperature sensor in motor generator



Detection of motor generator temperature



Multi-Use Tester connector



Communication with Multi-Use Tester



(2) High voltage battery box Part name



Main function or operation



Starter switch ON power supply



Supplies electronic control unit power supply (with starter switch ON)



Battery direct power supply



Supplies electronic control unit power supply (continuous)



Main contactor (+)



Connection/Disconnection between high voltage battery and inverter (positive side)



Main contactor (–)



Connection/Disconnection between high voltage battery and inverter (negative side)



Pre-charge contactor



Connects during charging



Current sensor



Detection of current in high voltage battery box



Module



Consists of 48 series-connected cells, 2 modules are high voltage batteries



High voltage battery total voltage



Battery electronic control unit detects high voltage battery total voltage



Cell controller



Provides battery electronic control unit with each cell information



Battery cooling fan



Discharges heat generated from high voltage battery into outside of high voltage battery box



Multi-Use Tester connector



Communication with Multi-Use Tester



18-13



STRUCTURE AND OPERATION 2.2 Motor electronic control unit • See Gr22E since main control related to the hybrid electric vehicle system is executed by INOMAT-II electronic control unit. (1) Motor generator torque (drive force) control function



• When the INOMAT-II electronic control unit commands the motor electronic control unit to generate torque (drive force), the motor electronic control unit outputs a signal to the inverter to activate the motor generator. • When the motor generator or inverter is overheated or in other abnormal conditions, the motor electronic control unit operates the motor generator restricting its torque (drive force and regenerated force). (2) High voltage cooling system control function



• The motor electronic control unit operates the blower motor and water pump according to the motor generator and inverter temperatures.



18-14



18 (3) Contactor control function



• Contactors, housed in the junction box of the high voltage battery box, serve as relays to open and close the high voltage circuit between the high voltage battery and inverter. • To activate the hybrid electric vehicle system, the motor electronic control unit commands the main contactor (+) and (–) to close. This can cause electric power to be sent to the inverter to activate the motor generator. • To charge the high voltage battery, the motor electronic control unit commands the pre-charge contactor to close. (4) Diagnostic function • The motor electronic control unit constantly monitors the operating condition of respective sensors for failure during the starter switch ON. If any sensor is faulty, fault information is indicated on the meter cluster to inform the driver. At the same time, the fault location is stored as a diagnosis code and control-during-fault is started. • During control-during-fault, the motor electronic control unit restricts the system function to ensure safety of the vehicle and driver. The stored diagnosis code can be retrieved on Multi-Use Tester or through the warning lamp illumination. • Control-during-fault can be categorized as in the following table. Control-during-fault



Major cause



Normal



Lamp illumination status



–



Hybrid electric vehicle system operation inhibited



Major fault



Hybrid electric vehicle system operates with partial decline in function



Minor fault



• Diagnosis code differs between Multi-Use Tester and warning lamp indication.



18-15



STRUCTURE AND OPERATION 2.3 Battery electronic control unit (1) High voltage battery monitoring function



• The battery electronic control unit performs such functions as measurement of the total voltage of the high voltage battery and estimation of high voltage battery state of charge, and monitors the high voltage battery to ensure the secure power supply. • The cell controller equalizes the voltages of all the cells. • The battery electronic control unit controls the battery cooling fan in accordance with cell temperature data received from the cell controllers to cool the high voltage battery. (2) Diagnostic function • The battery electronic control unit has the same diagnostic functions as the motor electronic control unit does; however, some diagnosis codes (minor faults) can be accessed on Multi-Use Tester only.



18-16



18 M E M O



18-17



STRUCTURE AND OPERATION 3. Electronic Control Unit Connection Diagram



18-18



18



18-19



TROUBLESHOOTING 1. Diagnosis Procedure • Perform the inspection in accordance with the following flowchart.



Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Erase the diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions WARNING • When removing the high voltage cable (orange), see “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT” and perform maintenance in an appropriate manner. • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition.



18-20



18 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • Diagnosis codes for the battery electronic control unit (except minor faults) are sent to meter cluster via motor electronic control unit. Code



Message



Warning Flashes lamp indication



Code



Message



Warning Flashes lamp indication



P0A05 Water Pump Driver Failure



10



O



P1A07 IPM U Temp Sensor Failure



19



O



P0A1B CPU Failure



28



O



P1A08 IPM V Temp Sensor Failure



20



O



P0A2B Motor Temp Sensor Failure



18



O



P1A09 IPM W Temp Sensor Failure



21



O



P0A2F Motor Coil Over Temp



16



O



P1A0A CAN NG Data Received



23



O



P0A3C IPM Over Temp



17



O



P1A0B Motor Locked



25



O



P0A3F Resolver Failure Flug



26



O



P1A0C Memory Failure



29



O



P0A44 Resolver Over Value



27



O



P1A0D



34



O



P0A5E UVW Disconnect



15



O



P1A0E Hill Start Input Failure



35



O



P0A5F UVW Over Current



12



O



P1A0F STS CAN Failure



39



O



P0A78 IPM Failure



13



O



P1A10 P1A04 happens



40



O



P0A7E



53



O



P1A13 Motor Over Speed



43



O



P0A90 Motor Torque Unmatch



32



O



P1A51



54



O



P0AA1 Main Contactor P&N Welded



09



O



P1A52



BCU Cell Over Charge Signal



56



O



P0AA6



BCU Leak



65



O



P1A53



BCU Cell Over Charge



57



O



P0AC2



BCU Over Current



52



O



P1A54



BCU Current/Voltage Unmatch



61



O



60



O



P1A55



62



O



P0AD9 Main Contactor Driver Failure



08



O



P1A56



63



O



P0AE2 Precharge Contactor Welded



37



O



P1A57



BCU CAN Receive Failure



66



O



Smooth Capacitor Charge P0AE3 Shortage



05



O



P1A58



BCU CAN Transmit Failure



67



O



P0AC3



BCU Over Temperature



BCU Current Sensor Failure



Brake Pressure Sensor Failure



BCU Cell Over Discharge



BCU Initial Voltage Failure BCU CC Communication Failure



P0AED IPM Temp Sensor Failure



22



O



P1A59



BCU CAN Bus Off



68



O



P0AFA



BCU Over Discharge



55



O



P1A60



BCU CAN Initialize Failure



69



O



P0AFB



BCU Over Charge



58



O



P1A62



BCU CC Balancing SW Failure



71



O



BCU CC Sensing Line Failure



72



O



P1A00



Smooth Capacitor Low Voltage



02



O



P1A63



P1A01



Smooth Capacitor Over Voltage



03



O



P1A65



BCU Temp Sensor Failure



74



O



P1A02 BCU Battery Low Voltage



04



O



P1A66



BCU Voltage Sensor Failure



75



O



P1A03 24V Battery Low Voltage



06



O



P1A67



BCU CC IC Number Unmatch



76



O



07



O



P1A68



BCU Cell Voltage Unbalance



77



O



P1A05 Radiator Fan Driver Failure



11



O



U0001 CAN No Data Received



24



O



P1A06 IPU Time Out



14



O



U3010 S Input Failure



33



O



P1A04



Smooth Capacitor Discharge Fail



: Diagnosis code of battery electronic control unit (See “TROUBLESHOOTING ”.)



18-21



TROUBLESHOOTING 3.2 Diagnosis code generation conditions and inspection items P0A05: Water Pump Driver Failure (warning lamp flashes: 10) Generation condition



Inconsistency between water pump operation command and detected monitor signal



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



Freeze frame data



73: Water Pump ON/OFF Monitor 98: Water Pump Relay ON/OFF



Service data



A7: P1A53 happens



Other



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P0A1B: CPU Failure (warning lamp flashes: 28) Generation condition



Abnormality of inverter in motor electronic control unit is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



Other



P0A2B: Motor Temp Sensor Failure (warning lamp flashes: 18) Generation condition



Abnormality of motor generator temperature (open-circuit or short is detected)



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Freeze frame data Electronic control unit connector Inspection



06: Motor Stator Temperature 01 : Motor generator (temperature sensor)



Electrical equipment



#437: Motor generator (temperature sensor)



Electric circuit diagram



Circuit between motor electronic control unit and motor generator



Other



Replacement of motor electronic control unit (inverter software abnormality)



P0A2F: Motor Coil Over Temp (warning lamp flashes: 16) Generation condition



Motor generator temperature is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data Electronic control unit connector Inspection



18-22



06: Motor Stator Temperature 01 : Motor generator (temperature sensor)



Electrical equipment



#437: Motor generator (temperature sensor)



Other



• Inspection of trapped air and coolant leakage in high voltage cooling system • Replacement of motor electronic control unit (inverter software abnormality)



18 P0A3C: IPM Over Temp (warning lamp flashes: 17) Generation condition



Inverter temperature is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data



07: Inverter U Temperature 08: Inverter V Temperature 09: Inverter W Temperature



Other



• Inspection of trapped air and coolant leakage in high voltage cooling system • Replacement of motor electronic control unit (inverter software abnormality)



Inspection



P0A3F: Resolver Failure Flug (warning lamp flashes: 26) Generation condition



Abnormality of revolution sensor in motor generator is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data Electronic control unit connector Inspection



79: P0A3F happens 01 : Motor generator (revolution sensor)



Electrical equipment



#437: Motor generator (revolution sensor)



Electric circuit diagram



Circuit between motor electronic control unit and motor generator



Other



Replacement of motor electronic control unit (inverter software abnormality)



P0A44: Resolver Over Value (warning lamp flashes: 27) Generation condition



Revolution sensor in motor generator is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Electronic control unit connector Inspection



01 : Motor generator (revolution sensor)



Electrical equipment



#437: Motor generator (revolution sensor)



Electric circuit diagram



Circuit between motor electronic control unit and motor generator



Other



Replacement of motor electronic control unit (inverter software abnormality)



P0A5E: UVW Disconnect (warning lamp flashes: 15) Generation condition



Open-circuit of three-phase alternating current circuit is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Electronic control unit connector Inspection



01 : Motor generator (alternating current power supply system)



Electrical equipment



#437: Motor generator (alternating current power supply system)



Electric circuit diagram



Three-phase alternating current system (circuit between motor generator and motor electronic control unit)



Other



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



18-23



TROUBLESHOOTING P0A5F: UVW Over Current (warning lamp flashes: 12) Generation condition



Three-phase alternating current is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



0B: U Current 0C: V Current 0D: W Current



Electric circuit diagram



Three-phase alternating current system (circuit between motor generator and motor electronic control unit)



Other



• Short-circuit in AC power supply system in motor electronic control unit or motor generator • Replacement of motor electronic control unit (inverter software abnormality)



P0A78: IPM Failure (warning lamp flashes: 13) Generation condition



Abnormality in inverter



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data



C1: IPU F0 Error C5: IPU Over Voltage C6: IPU Over Temp



Other



• Inspection of trapped air and coolant leakage in high voltage cooling system • Replacement of motor electronic control unit (inverter software abnormality)



Inspection



P0A90: Motor Torque Unmatch (warning lamp flashes: 32) Generation condition



Difference between required motor generator torque (drive force) and actual motor generator torque (drive force) is at or above the specified value during motor generator control.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



18-24



Freeze frame data



04: Motor Actual Torque 11: Motor Demand Torque (Normal if they are the same.)



Electric circuit diagram



Three-phase alternating current system (circuit between motor generator and motor electronic control unit)



Other



Inspection of insulation resistance of motor electronic control unit, high voltage cable and motor generator (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.)



18 P0AA1: Main Contactor P&N Welded (warning lamp flashes: 09) Generation condition



Adhesion of main contactor (+) is detected. (Seizure in ON condition)



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Service data



92: Main Contactor N ON/OFF 96: Main Contactor P ON/OFF



Actuator test



A3: P0A7E happens A4: P1A51 happens



Electronic control unit connector



04 : Contactor signal (insulation resistance)



Electric circuit diagram



Contactor system (circuit between motor electronic control unit and high voltage battery box)



Other



• Replacement of high voltage battery box • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P0AD9: Main Contactor Driver Failure (warning lamp flashes: 08) Generation condition



Inconsistency between main contactor (+) operation command and detected monitor signal



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Conduct the following inspection after performing troubleshooting of battery electronic control unit.



Inspection



Service data



92: Main Contactor N ON/OFF 96: Main Contactor P ON/OFF



Actuator test



A3: P0A7E happens A4: P1A51 happens



Electronic control unit connector



02 : High voltage battery box (power supply voltage of electronic control unit) 03 : High voltage battery box (continuity of contactor)



(See “TROUBLESHOOTING ”.) Electric circuit diagram



Contactor system (circuit between motor electronic control unit and high voltage battery box)



Other



• Replacement of high voltage battery box • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P0AE2: Precharge Contactor Welded (warning lamp flashes: 37) Generation condition



When READY indicator lamp is on, smoothing capacitor voltage rises above the specified value during standby for pre-charge contactor to turn ON after main contactor ON.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Inspection



Freeze frame data



03: Motor Speed



Service data



97: Precharge Contactor ON/OFF



Actuator test



A5: P0AFA happens



Electronic control unit connector



04 : Contactor signal (insulation resistance)



Electric circuit diagram



Pre-charge contactor system (circuit between motor electronic control unit and high voltage battery box)



Other



• Replacement of high voltage battery box • Replacement of motor electronic control unit (inverter software abnormality)



18-25



TROUBLESHOOTING P0AE3: Smooth Capacitor Charge Shortage (warning lamp flashes: 05) Generation condition



Voltage across smoothing capacitor is below the target charging voltage after pre-charge contactor ON.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor and pre-charge contactor OFF (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



92: Main Contactor N ON/OFF 97: Precharge Contactor ON/OFF (If they are both ON, abnormality of direct current high voltage system. If not, contactor abnormality.)



Freeze frame data



Inspection



Other



Perform troubleshooting of battery electronic control unit.



Electric circuit diagram



Direct current high voltage system (circuit between high voltage battery box and motor electronic control unit)



Other



Replacement of motor electronic control unit (inverter internal circuit faulty)



Inspection



Service data



92: Main Contactor N ON/OFF 97: Precharge Contactor ON/OFF



Actuator test



A4: P1A51 happens A5: P0AFA happens



Electronic control unit connector



03 : High voltage battery box (continuity of contactor) (See “TROUBLESHOOTING ”.)



Electric circuit diagram



Contactor system (circuit between high voltage battery box and motor electronic control unit)



Other



• Replacement of high voltage battery box • Replacement of motor electronic control unit (inverter internal circuit faulty)



P0AED: IPM Temp Sensor Failure (warning lamp flashes: 22) Generation condition



Abnormality of temperature sensor in inverter



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Freeze frame data



07: Inverter U Temperature 08: Inverter V Temperature 09: Inverter W Temperature



Other



Replacement of motor electronic control unit (abnormality of temperature sensor in inverter or software)



Inspection



P1A00: Smooth Capacitor Low Voltage (warning lamp flashes: 02) Generation condition



Voltage across smoothing capacitor is below the specified value after main contactor (+) ON.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Conduct the following inspection after performing troubleshooting of battery electronic control unit.



Inspection



18-26



Freeze frame data



02: Voltage



Electric circuit diagram



Direct current high voltage system (circuit between high voltage battery box and motor electronic control unit)



Other



• Replacement of high voltage battery box (high voltage battery voltage faulty)



• Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



18 P1A01: Smooth Capacitor Over Voltage (warning lamp flashes: 03) Generation condition



Voltage across smoothing capacitor is above the specified value after main contactor (+) ON.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator control immediately terminated. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



02: Voltage



Other



• Perform troubleshooting of battery electronic control unit. • Replacement of high voltage battery box (high voltage battery voltage faulty)



• Replacement of motor electronic control unit (inverter software abnormality)



P1A02: BCU Battery Low Voltage (warning lamp flashes: 04) Generation condition



High voltage battery total voltage (via controller area network communication) is at or below the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



02: Voltage



Other



• Perform troubleshooting of battery electronic control unit. • Replacement of high voltage battery box (high voltage battery box voltage faulty or battery electronic control unit faulty) • Replacement of motor electronic control unit (inverter software abnormality)



P1A03: 24V Battery Low Voltage (warning lamp flashes: 06) Generation condition



Abnormality of battery direct power supply voltage



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data Electronic control unit connector Inspection



7A: P1A03 happens 05 : Power supply voltage of electronic control unit (battery direct power supply)



Electric circuit diagram



Circuit between motor electronic control unit and battery



Other



• Inspection of battery and alternator (See Gr54.) • Replacement of motor electronic control unit (inverter software abnormality)



18-27



TROUBLESHOOTING P1A04: Smooth Capacitor Discharge Fail (warning lamp flashes: 07) Generation condition



After discharge command, voltage across smoothing capacitor is above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Electric discharge command stopped. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Other



When another diagnosis code is issued, perform its troubleshooting. 03: Motor Speed



Freeze frame data



Inspection



92: Main Contactor N ON/OFF 96: Main Contactor P ON/OFF (If they are both OFF, replace motor electronic control unit (internal circuit abnormality).)



Service data



92: Main Contactor N ON/OFF 96: Main Contactor P ON/OFF



Actuator test



A3: P0A7E happens A4: P1A51 happens



Electronic control unit connector



04 : Contactor signal (insulation resistance) 03 : High voltage battery box (insulation resistance)



(See “TROUBLESHOOTING ”.) Electric circuit diagram



Contactor system (circuit between high voltage battery box and motor electronic control unit)



Other



• Replacement of high voltage battery box (internal circuit faulty)



• Replacement of motor electronic control unit (internal circuit faulty)



P1A05: Radiator Fan Driver Failure (warning lamp flashes: 11) Generation condition



Inconsistency between blower motor operation command and detected monitor signal



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



Freeze frame data



74: Radiator Fan ON/OFF Monitor 89: Radiator Fan Relay ON/OFF



Actuator test



A6: P1A52 happens



Other



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P1A06: IPU Time Out (warning lamp flashes: 14) Generation condition



Abnormality in battery electronic control unit



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of motor electronic control unit (inverter software abnormality)



Other



P1A07: IPM U Temp Sensor Failure (warning lamp flashes: 19) Generation condition



Abnormality of temperature sensor in inverter



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



18-28



Freeze frame data



07: Inverter U Temperature



Other



Replacement of motor electronic control unit (abnormality of temperature sensor in inverter or software)



18 P1A08: IPM V Temp Sensor Failure (warning lamp flashes: 20) Generation condition



Abnormality of temperature sensor in inverter



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



Freeze frame data



08: Inverter V Temperature



Other



Replacement of motor electronic control unit (abnormality of temperature sensor in inverter or software)



P1A09: IPM W Temp Sensor Failure (warning lamp flashes: 21) Generation condition



Abnormality of temperature sensor in inverter



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



Freeze frame data



09: Inverter W Temperature



Other



Replacement of motor electronic control unit (abnormality of temperature sensor in inverter or software)



P1A0A: CAN NG Data Received (warning lamp flashes: 23) Generation condition



Controller area network communication data reception is abnormal. (bus off status at transmission or reception; data out of range)



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Electronic control unit connector



Inspection



02 : Controller area network resistor



Electrical equipment



#828: Controller area network resister



Electric circuit diagram



Controller area network resistor system



Other



• Inspection of controller area network transmission status of other electronic control units • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P1A0B: Motor Locked (warning lamp flashes: 25) Generation condition



Inhibited value of torque (drive force) is beyond the specified value and motor speed is below the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Standby with 0% torque (drive force) command for motor generator. (Motor generator assist torque drops.)



Freeze frame data Electronic control unit connector Inspection



03: Motor Speed 01 : Motor generator (revolution sensor)



Electrical equipment



#437: Motor generator (revolution sensor)



Electric circuit diagram



Circuit between motor electronic control unit and motor generator



Other



• Replacement of clutch housing and motor generator (motor generator broken) (See Gr22.) • Replacement of motor electronic control unit (inverter software abnormality)



18-29



TROUBLESHOOTING P1A0C: Memory Failure (warning lamp flashes: 29) Generation condition



Abnormality of inverter in motor electronic control unit is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



Other



P1A0D: Brake Pressure Sensor Failure (warning lamp flashes: 34) Generation condition



Brake fluid pressure sensor voltage deviates from the specified value or is inconsistent with stop lamp signal (controller area network communication) during operation control.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



None



Inspection



Freeze frame data



1B: Brake Pressure Sensor Value



Electrical equipment



#302: Brake fluid pressure sensor



Electric circuit diagram



Circuit between motor electronic control unit and brake fluid pressure sensor



Other



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



P1A0E: Hill Start Input Failure (warning lamp flashes: 35) Generation condition



Either of the following: • Abnormal motor requiring torque (power) while hill start assist system is operating • Operation of hill start assist system continues for a specified duration



Recoverability



Recovered if hill start assist system indicator lamp goes out.



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) Backup mode as: Brake pedal pressed: Hill start assist system operating; brake pedal released: Hill start assist system not operating. (Vehicle can run with hybrid electric system operation despite partial decline in function.)



Freeze frame data Electronic control unit connector Inspection



18-30



88: Hill start lamp ON/OFF 06 : Hill start assist system operation signal



Electric circuit diagram



Circuit between motor electronic control unit and hill start assist system electronic control unit



Other



• Hill start assist system (See Gr35EB.) • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



18 P1A0F: STS CAN Failure (warning lamp flashes: 39) Generation condition



Motor generator speed is at or above 1500 rpm and stop lamp switch information (controller area network communication) is abnormal.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication), amount of brake pedal depression fixed to 0. (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Freeze frame data



9B: Brake SW Input (CAN)



Electrical equipment



#042: Stop lamp switch



Electric circuit diagram



Circuit among motor electronic control unit, controller area network communication line, INOMAT-II electronic control unit and stop lamp switch



Other



• When a diagnosis code related to controller area network communication is issued, perform its troubleshooting. • Inspection of controller area network transmission status of INOMAT-II electronic control unit and presence of diagnosis code related to stop lamp switch. (See Gr22E.) • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



Inspection



P1A10: P1A04 happens (warning lamp flashes: 40) Generation condition



System was restarted after it is once terminated while diagnosis code P1A04: [Smooth Capacitor Discharge Fail (flashes: 07)] occurs.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Inspection



• When another diagnosis code is issued, perform its troubleshooting. • Check that this diagnosis code is not issued by turning the starter switch from OFF to ON. • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



Other



P1A13: Motor Over Speed (warning lamp flashes: 43) Generation condition



Motor generator speed is at or above the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Motor generator torque (drive force and regenerated force) is inhibited. (Vehicle can run with hybrid electric vehicle system operation.)



Inspection



Freeze frame data



03: Motor Speed



Electrical equipment



#437: Motor generator (revolution sensor)



Other



Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



18-31



TROUBLESHOOTING U0001: CAN No Data Received (warning lamp flashes: 24) Generation condition



No data received with controller area network communication



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Main contactor OFF after motor generator speed decreased. (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data Electronic control unit connector Inspection



17: INOMAT CAN Receive Time 18: BCU CAN Receive Time 02 : Controller area network resistor



Electric circuit diagram



Controller area network resistor system



Other



• Inspection of controller area network transmission status of other electronic control units • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



U3010: S Input Failure (warning lamp flashes: 33) Generation condition



Abnormality of starter switch start signal is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication), engine started from starter. (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Freeze frame data Electronic control unit connector Inspection



7B: S Input SW2 ON/OFF 86: S Input SW1 ON/OFF 03 : Starter switch start signal



Electric circuit diagram



Starter switch start signal system (among motor electronic control unit, starter switch and battery)



Other



• Inspection of starter switch (See Gr54.) • Replacement of motor electronic control unit (inverter internal circuit faulty or software abnormality)



4. Freeze Frame Data of Multi-Use Tester • Freeze frame data is the value of service data at the generation of a diagnosis code. • Multiple freeze frame data related to the generated diagnosis code can be accessed on Multi-Use Tester. • For diagnostic criteria, see the table of service data.



18-32



18 5. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No.



Item



Data



Inspection condition



Requirement



01 Smooth Capacitor Voltage



. V



READY indicator lamp illuminates



235 to 430 V



02 Voltage



. V



READY indicator lamp illuminates



240 to 418 V Synchronous with tachometer



. rpm



Vehicle stationary with shift lever in N position Vehicle stationary with shift lever in D position



03 Motor Speed



Vehicle in motion 04 Motor Actual Torque



. Nm



READY indicator lamp illuminates



0 rpm Synchronous with tachometer Approximately consistent with required motor torque



05 Final Torque Instruction



.



%



READY indicator lamp illuminates



–100 to 100%



06 Motor Stator Temperature



.



°C



READY indicator lamp illuminates



07 Inverter U Temperature



.



°C



READY indicator lamp illuminates



08 Inverter V Temperature



.



°C



READY indicator lamp illuminates



09 Inverter W Temperature



.



°C



READY indicator lamp illuminates



0A Current Effect Value



.



%



READY indicator lamp illuminates



0 to 130%



0B U Current



.



%



READY indicator lamp illuminates



–130 to 130%



0C V Current



.



%



READY indicator lamp illuminates



–130 to 130%



0D W Current



.



%



READY indicator lamp illuminates



–130 to 130%



Normal temperature to 140°C Normal temperature to 100°C Normal temperature to 100°C Normal temperature to 100°C



0E Resolver Input Value



.



–



–



0F Last Resolver Input Value



.



–



–



10 Mode Sequence No.



. digit



–



–



11 Motor Demand Torque



. Nm



12 SOC *1



.



%



READY indicator lamp illuminates



Approximately consistent with actual motor torque



READY indicator lamp illuminates



20 to 70%



13 Maximum Drive Torque



. Nm



–



–



14 Maximum Regenerate Torque



. Nm



–



–



15 Present Time



. ms



16 IPU Receive Time



. ms



17 INOMAT CAN Receive Time



. ms



18 BCU CAN Receive Time



. ms



Displays time elapsed after power is supplied to motor electronic control unit Displays time elapsed after receiving data from inverter Displays time elapsed after receiving data from INOMAT-II electronic control unit Displays time elapsed after receiving data from battery electronic control unit



Stator Temperature Input Value



.



V



READY indicator lamp illuminates



1B Brake Pressure Sensor Value



.



V



Brake pedal firmly pressed Brake pedal released



1A



0 to 4080 ms 0 to 4080 ms 0 to 4080 ms (normal if value increases) 0 to 4080 ms (normal if value increases) 0.9 V (140°C) to 4.6 V (10°C) Above 1.1 V Approx. 0.5 V



*1: High voltage battery state of charge



18-33



TROUBLESHOOTING No.



Item INOMAT CAN Over Range 1F Time



Data



Inspection condition



Requirement



. digit



INOMAT-II system normal



0 digit *



20 BCU CAN Over Range Time



. digit



Battery electronic control unit normal



0 digit *



21 CAN Bus Off Time



. digit



Controller area network communication normal



0 digit *



24 Shut Down Voltage



. V



–



–



25 Inverter U Current



.



%



READY indicator lamp illuminates



–130 to 130%



26 Inverter V Current



.



%



READY indicator lamp illuminates



–130 to 130%



27 Inverter W Current



.



%



READY indicator lamp illuminates



–130 to 130%



28 Memory Trouble 72



.



Main Contactor ON/OFF MoniON/OFF tor



73 Water Pump ON/OFF Monitor



ON/OFF



74 Radiator Fan ON/OFF Monitor ON/OFF



75 Memory Clear SW ON/OFF



ON/OFF



76 Diag SW ON/OFF



ON/OFF



79 P0A3F happens



ON/OFF



7A P1A03 happens



ON/OFF



7B S Input SW2 ON/OFF



ON/OFF



86 S Input SW1 ON/OFF



ON/OFF



87 M Input SW ON/OFF



ON/OFF



88 Hill Start Lamp ON/OFF



ON/OFF



89 Radiator Fan Relay ON/OFF



ON/OFF



92 Main Contactor N ON/OFF



ON/OFF



93



Capacitor Discharge FET ON/ ON/OFF OFF



96 Main Contactor P ON/OFF



*digit: number of times



18-34



ON/OFF



–



–



READY indicator lamp illuminates ON READY indicator lamp extinguished OFF Motor generator temperature above ON 50°C Cold OFF [Actuator test] A7: Water Pump ON Motor generator temperature above ON 80°C Cold OFF [Actuator test] A6: Radiator Fan ON Memory clear switch connected ON Memory clear switch released OFF Memory clear switch connected ON Memory clear switch released OFF Revolution sensor in motor generator ON abnormal Revolution sensor in motor generator OFF normal Battery direct power supply abnormal ON Battery direct power supply normal OFF Starter switch in START position ON Other cases OFF Starter switch in START position ON Other cases OFF Starter switch in ON position ON Other cases OFF Hill start indicator lamp illuminates ON Hill start indicator lamp extinguished OFF Motor generator temperature above ON 80°C Cold OFF [Actuator test] A6: Radiator Fan ON READY indicator lamp illuminates ON READY indicator lamp extinguished (Hybrid electric vehicle system opera- OFF tion inhibited) [Actuator test] A4: Main Contactor N ON – READY indicator lamp illuminates ON READY indicator lamp extinguished (Hybrid electric vehicle system opera- OFF tion inhibited) [Actuator test] A3: Main Contactor P ON



–



18 No.



Item



Data



97 Precharge Contactor ON/OFF ON/OFF



98 Water Pump Relay ON/OFF



ON/OFF



99 BCU OK Flug ON/OFF



ON/OFF



9A BCU NG Flug ON/OFF



ON/OFF



9B Brake SW Input (CAN)



ON/OFF



9C S Input History



ON/OFF



A2 P0AC2 happens



ON/OFF



A3 P0A7E happens



ON/OFF



A4 P1A51 happens



ON/OFF



A5 P0AFA happens



ON/OFF



A6 P1A52 happens



ON/OFF



A7 P1A53 happens



ON/OFF



A8 P0AFB happens



ON/OFF



AA P0AC3 happens



ON/OFF



AB P1A54 happens



ON/OFF



AC P1A55 happens



ON/OFF



AD P1A56 happens



ON/OFF



AF P0AA6 happens



ON/OFF



B0 P1A57 happens



ON/OFF



B1 P1A58 happens



ON/OFF



B2 P1A59 happens



ON/OFF



B3 P1A60 happens



ON/OFF



B5 P1A62 happens



ON/OFF



Inspection condition Immediately after starter switch ON ON (approx. 1 second) Other cases OFF [Actuator test] A5: Precharge Contactor ON Motor generator temperature above ON 50°C Cold OFF [Actuator test] A7: Water Pump ON READY indicator lamp illuminates ON READY indicator lamp extinguished (diagnosis code related to high voltage OFF battery abnormality issued) READY indicator lamp extinguished (diagnosis code related to high voltage ON battery abnormality issued) READY indicator lamp illuminates OFF Brake pedal pressed ON Brake pedal not pressed OFF Starter switch placed in START position more than once after starter switch ON ON Other cases OFF Diagnosis code P0AC2 (52) issued ON Other cases OFF Diagnosis code P0A7E (53) issued ON Other cases OFF Diagnosis code P0A51 (54) issued ON Other cases OFF Diagnosis code P0AFA (55) issued ON Other cases OFF Diagnosis code P1A52 (56) issued ON Other cases OFF Diagnosis code P1A53 (57) issued ON Other cases OFF Diagnosis code P0AFB (58) issued ON Other cases OFF Diagnosis code P0AC3 (60) issued ON Other cases OFF Diagnosis code P1A54 (61) issued ON Other cases OFF Diagnosis code P1A55 (62) issued ON Other cases OFF Diagnosis code P1A56 (63) issued ON Other cases OFF Diagnosis code P0AA6 (65) issued ON Other cases OFF Diagnosis code P1A57 (66) issued ON Other cases OFF Diagnosis code P1A58 (67) issued ON Other cases OFF Diagnosis code P1A59 (68) issued ON Other cases OFF Diagnosis code P1A60 (69) issued ON Other cases OFF Diagnosis code P1A62 (71) issued ON Other cases OFF



Requirement



18-35



TROUBLESHOOTING No.



Item



Data



B6 P1A63 happens



ON/OFF



B8 P1A65 happens



ON/OFF



B9 P1A66 happens



ON/OFF



BA P1A67 happens



ON/OFF



BB P1A68 happens



ON/OFF



C1 IPU FO Error



ON/OFF



C2 IPU Temp Sensor W Error



ON/OFF



C3 IPU Temp Sensor V Error



ON/OFF



C4 IPU Temp Sensor U Error



ON/OFF



C5 IPU Over Voltage



ON/OFF



C6 IPU Over Temp



ON/OFF



CD Torque Reduction (No.1–2)



ON/OFF



CE Torque Reduction (No.3–4)



ON/OFF



CF Torque Reduction (No.5)



ON/OFF



D0 Torque Reduction (No.6–10)



ON/OFF



D1 Torque Reduction (No.11)



ON/OFF



E1 d Output Torque Reduction



ON/OFF



E2 d Integration Torque Reduction ON/OFF E3 q Output Torque Reduction



ON/OFF



E4 q Integration Torque Reduction ON/OFF E6 U Duty Torque Reduction



ON/OFF



E7 V Duty Torque Reduction



ON/OFF



E8 W Duty Torque Reduction



ON/OFF



18-36



Inspection condition Diagnosis code P1A63 (72) issued Other cases Diagnosis code P1A65 (74) issued Other cases Diagnosis code P1A66 (75) issued Other cases Diagnosis code P1A67 (76) issued Other cases Diagnosis code P1A68 (77) issued Other cases



ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON Any one of them possibly ON when di- OFF agnosis code P0A1B (28) “CPU FailON ure” issued OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON Any one of them possibly ON when OFF output limitation warning lamp illumiON nates OFF ON OFF ON OFF ON OFF ON OFF ON OFF



Requirement



18 6. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



Item



Explanation



Confirmation method



A1 Motor Drive



Motor generator activated (automatically stopped when high voltage battery state of charge reaches 30%) [Can be executed when the following conditions are satisfied] • READY indicator lamp illuminates • Engine idling (motor generator speed 500 to 1000 rpm) • 20 seconds after shift lever placed in N position • Actuator test No. A1 and A2 not activated simultaneously



Check that engine and motor generator speed increases. [Service data] 03: Motor Speed



A2 Motor Regenerate



Charging from driven motor generator (automatically stopped when high voltage battery state of charge reaches 60%) [Can be executed when the following conditions are satisfied] • READY indicator lamp illuminates • Engine idling (motor generator speed 500 to 1000 rpm) • 20 seconds after shift lever placed in N position • Actuator test No. A1 and A2 not activated simultaneously



Check that the following service data value increases (high voltage battery state of charge). [Service data] 12: SOC



A3 Main Contactor P ON



Main contactor (+) connected (automatic reset after 6 seconds) [Can be executed when the following conditions are satisfied] • Safety plug disconnected (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.) • Two or more of actuator tests No. A3, A4 and A5 not activated simultaneously



Check that operation sound of main contactor (+) in high voltage battery box is noted. [Service data] 96: Main Contactor P ON/ OFF



A4 Main Contactor N ON



Main contactor (–) connected (automatic reset after 6 seconds) [Can be executed when the following conditions are satisfied] • Safety plug disconnected (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.) • Two or more of actuator tests No. A3, A4 and A5 not activated simultaneously



Check that operation sound of main contactor (–) in high voltage battery box is noted. [Service data] 92: Main Contactor N ON/ OFF



A5 Precharge Contactor ON



Pre-charge contactor connected (automatic reset after 6 seconds) [Can be executed when the following conditions are satisfied] • Safety plug disconnected (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.) • Two or more of actuator tests No. A3, A4 and A5 not activated simultaneously



Check that operation sound of pre-charge contactor in high voltage battery box is noted. [Service data] 97: Precharge Contactor ON/OFF



Blower motor activated (automatic reset after 6 seconds)



Check visually or with operation sound that blower motor operates. [Service data] 89: Radiator Fan Relay ON/OFF



Water pump activated (automatic reset after 10 minutes)



• Check with operation sound that water pump operates. • Used for air bleeding of high voltage cooling system. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) [Service data] 98: Water Pump Relay ON/ OFF



A6 Radiator Fan ON



A7 Water Pump ON



18-37



TROUBLESHOOTING 7. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 , and so on) correspond to the similarly printed reference numbers in section “3. Inspections Based on Diagnosis Codes”.



7.1 Electronic control unit connector terminal layout



7.2 Inspection instructions • Inspections are performed with the connector removed because of the water and dust-proof connector.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes.



Check item 01



Resistance of motor generator



18-38



Measurement method [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements]



Terminals: A9-A10 • 0°C: 144.0 to 182.5 kΩ • 5°C: 112.3 to 140.8 kΩ • 10°C: 88.2 to 109.5 kΩ • 15°C: 69.8 to 85.8 kΩ • 20°C: 55.7 to 67.8 kΩ • 25°C: 44.7 to 53.9 kΩ • 30°C: 36.1 to 43.2 kΩ



Terminals: A3-A7: 30.2 ± 6.0 Ω A2-A6: 33.8 ± 6.8 Ω A1-A5: 12.3 ± 2.5 Ω



* Regarding disconnection of high voltage cable, see “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”. Terminals: U-V, V-W and W-U: 0.028 ± 0.003 Ω (at 20°C)



18 Check item 02



Resistance of controller area network resistor



03



Voltage of starter switch start signal



04



Insulation resistance of contactor signal



05



Power supply voltage of electronic control unit 06



Voltage of hill start assist system operation signal



Measurement method [Conditions] • Starter switch OFF • Disconnect engine electronic control unit from motor electronic control unit at connector and check at vehicle side harness. [Requirements] Terminals: A12-A13: 120 ± 6 Ω [Conditions] • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals (+)-(–): C3 or B16-C9 • Starter switch START position: Approx. 24 V • Starter switch except START position: 0 V [Conditions] • Starter switch OFF • Disconnect connector. Perform inspection on electronic control unit-side connector. [Requirements] Terminals (+)-(–): B10, B11 or B12-chassis ground: There is no continuity. [Conditions] • Disconnect connector. Perform inspection on vehicle-side connector. [Requirements] Terminals (+)-(–): C1 or C2-C9: Approx. 24 V [Conditions] • Starter switch ON • Disconnect harness from electronic control unit. Perform inspection on vehicle-side connector. [Requirements] Terminals (+) - (–): B15-C9 • Hill start assist system operating: 0 V • Hill start assist system not operating: Approx. 24 V



8. Possible Causes of Symptoms Warning lamp lights frequently during output limiting condition



Possible causes



• High-voltage system cooling system • Insufficient air bleeding • Insufficient coolant • Faulty water pump • Faulty blower motor • Clogged radiator • High-voltage battery box • Clogged air filter • Faulty battery cooling fan • Clogged air outlet of high-voltage battery box • Battery in high-voltage battery box expired (if service data No. 16: 59-1 is 300% or higher)



18-39



TROUBLESHOOTING 1. Diagnosis Procedure • Perform the inspection in accordance with the following flowchart.



Read diagnosis codes. (See Gr00.)



Perform inspection for each diagnosis code. (See later section.)



Is the fault location identified?



NO



YES Repair or replace the part.



Inspection on assumption of a transient fault (See Gr00.)



Erase the diagnosis code. (See Gr00.)



If the diagnosis code does not occur again, inspection is complete.



2. Diagnostic Precautions WARNING • When removing the high voltage cable (orange), see “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT” and perform maintenance in an appropriate manner. • Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. • To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before reconnecting battery cables, harnesses and connectors. • When performing measurement with the tester, handle the test bar carefully so that it does not damage internal circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in connector or between connector and car body. • Resistance is affected by temperature. Determine the necessity of resistance measurement following given temperature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition.



18-40



18 3. Inspections Based on Diagnosis Codes 3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • Diagnosis codes for the battery electronic control unit (except minor faults (codes with or )) are sent to the meter cluster via the motor electronic control unit. These codes are checked with diagnosis switch operation of the motor electronic control unit or Multi-Use Tester. • Some diagnosis codes (minor faults (codes with or )) do not cause the warning lamp to illuminate when they occurs. In addition, they cannot be checked with the diagnosis switch operation of the motor electronic control unit. Use Multi-Use Tester to check them. • Some diagnosis codes (codes with ) detect minor changes in condition. Inspection is not required since the condition returns to normal after some driving. Code



Message



Warning Flashes lamp indication



P0A7E Over Temp



53



O



Code



Message



Warning Flashes lamp indication



P1A62 CC Balancing SW Failure



71



O



P0AA6 Leak



65



O



P1A63 CC Sensing Line Failure



72



O



P0AC2 Over Current



52



O



P1A65 Temp Sensor Failure



74



O



P0AC3 Current Sensor Failure



60



O



P1A66 Voltage Sensor Failure



75



O



P0AFA Over Discharge



55



O



P1A67 CC IC Number Unmatch



76



O



P0AFB Over Charge



58



O



P1A68 Cell Voltage Unbalance



77



O



P1A51 Cell Over Discharge



54



O



P1A69



Leak Sensor Failure



–



O



P1A52 Cell Over Charge Signal



56



O



P1A70



12V Low Voltage



–



–



P1A53 Cell Over Charge



57



O



P1A71



12V Over Voltage



–



–



P1A54 Current/Voltage Unmatch



61



O



P1A72 Cooling Fan Failure



–



O



P1A55 Initial Voltage Failure



62



O



P1A73



Over Temp Warning



–



–



P1A56 CC Communication Failure



63



O



P1A74



Cell Low Voltage Warning



–



–



P1A57 CAN Receive Failure



66



O



P1A75



Low Voltage Warning



–



–



P1A58 CAN Transmit Failure



67



O



P1A76



Cell Over Voltage Warning



–



–



P1A59 CAN Bus Off



68



O



P1A77



Over Voltage Warning



–



–



P1A60 CAN Initialize Failure



69



O



P1A78 EEPROM Failure



–



O



3.2 Diagnosis code generation conditions and inspection items P0A7E Over Temp (warning lamp flashes: 53) Generation condition



High voltage battery temperature is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



03: Battery Highest Temp



Other



• Inspection of air filter in high voltage battery box (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.) • Replacement of high voltage battery box (internal circuit faulty)



18-41



TROUBLESHOOTING P0AA6: Leak (warning lamp flashes: 65) Generation condition



Battery electronic control unit detects high voltage battery current leakage in direct current high voltage system or three-phase alternating current system.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Electric circuit diagram



• Three-phase alternating current system (circuit between motor generator and motor electronic control unit) • Direct current high voltage system (circuit between high voltage battery box and motor electronic control unit)



Other



• Inspection of insulation resistance of motor electronic control unit, high voltage cable and motor generator (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.) • Replace high voltage battery box if insulation resistance of motor electronic control unit, high voltage cable and motor generator is normal.



Inspection



P0AC2: Over Current (warning lamp flashes: 52) Generation condition



Detected value of current sensor is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



02: Battery Current



Other



Replace high voltage battery box (internal circuit faulty). If the fault still remains, replace motor electronic control unit.



P0AC3: Current Sensor Failure (warning lamp flashes: 60) Generation condition



Abnormality of current sensor is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P0AFA: Over Discharge (warning lamp flashes: 55) Generation condition



High voltage battery total voltage is at or below the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data



01: Battery Full Voltage 05: SOC



Other



• Replace clutch housing and motor generator (See Gr22.) when service data 05: SOC decreases during engine idling. If the fault still remains, replace motor electronic control unit. • Replacement of high voltage battery box (internal circuit faulty)



Inspection



18-42



18 P0AFB: Over Charge (warning lamp flashes: 58) Generation condition



High voltage battery total voltage is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Freeze frame data



01: Battery Full Voltage 05: SOC



Other



• Replace clutch housing and motor generator (See Gr22.) when service data 05: SOC decreases during engine idling. If the fault still remains, replace motor electronic control unit. • Replacement of high voltage battery box (internal circuit faulty)



Inspection



P1A51: Cell Over Discharge (warning lamp flashes: 54) Generation condition



Over discharge of cell voltage (via cell controller) is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



05: SOC



Other



• Replace clutch housing and motor generator (See Gr22.) when service data 05: SOC decreases during engine idling. If the fault still remains, replace motor electronic control unit. • Replacement of high voltage battery box (internal circuit faulty)



P1A52: Cell Over Charge Signal (warning lamp flashes: 56) Generation condition



Maximum cell voltage (via overvoltage detection line) is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



05: SOC



Other



• Replace clutch housing and motor generator (See Gr22.) when service data 05: SOC decreases during engine idling. If the fault still remains, replace motor electronic control unit. • Replacement of high voltage battery box (internal circuit faulty)



P1A53: Cell Over Charge (warning lamp flashes: 57) Generation condition



Maximum cell voltage (via cell controller) is at or above the specified value.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Freeze frame data



05: SOC



Other



• Replace clutch housing and motor generator (See Gr22.) when service data 05: SOC decreases during engine idling. If the fault still remains, replace motor electronic control unit. • Replacement of high voltage battery box (internal circuit faulty)



18-43



TROUBLESHOOTING P1A54: Current/Voltage Unmatch (warning lamp flashes: 61) Generation condition



High voltage battery total voltage remains unchanged when high voltage battery current value has changed.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A55: Initial Voltage Failure (warning lamp flashes: 62) Generation condition



Abnormality of continuity in overvoltage detection line in cell controller is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A56: CC Communication Failure (warning lamp flashes: 63) Generation condition



Abnormality of cell controller communication is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A57: CAN Receive Failure (warning lamp flashes: 66) Generation condition



Reception abnormality of controller area network communication with motor electronic control unit



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Electronic control unit connector Inspection



01 : Controller area network resistor



Electric circuit diagram



Controller area network resistor system



Other



• Inspection of controller area network transmission status of motor electronic control unit (if abnormal, replacement of motor electronic control unit) • Replacement of high voltage battery box (internal circuit faulty)



P1A58: CAN Transmit Failure (warning lamp flashes: 67) Generation condition



Transmission abnormality of controller area network communication



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



18-44



Other



18 P1A59: CAN Bus Off (warning lamp flashes: 68) Generation condition



Abnormality of controller area network communication circuit in battery electronic control unit



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A60: CAN Initialize Failure (warning lamp flashes: 69) Generation condition



Abnormality of controller area network communication circuit in battery electronic control unit



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A62: CC Balancing SW Failure (warning lamp flashes: 71) Generation condition



Abnormality of cell controller is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A63: CC Sensing Line Failure (warning lamp flashes: 72) Generation condition



Abnormality of cell controller is detected when power is supplied.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A65: Temp Sensor Failure (warning lamp flashes: 74) Generation condition



Abnormality of cell controller is detected.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



18-45



TROUBLESHOOTING P1A66: Voltage Sensor Failure (warning lamp flashes: 75) Generation condition



Inconsistency between high voltage battery total voltage (detected by battery electronic control unit) and the sum of cell voltages (via cell controller)



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



• Check safety plug for mounting condition. • Replacement of high voltage battery box (internal circuit faulty)



Other



P1A67: CC IC Number Unmatch (warning lamp flashes: 76) Generation condition



Abnormality of cell controller is detected when power is supplied.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A68: Cell Voltage Unbalance (warning lamp flashes: 77) Generation condition



Difference between state of charge of each cell and its average value is at or above the specified value when power is supplied.



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Charge and discharge inhibited (Hybrid electric vehicle system operation inhibited, vehicle can run only with INOMAT-II.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A69: Leak Sensor Failure Generation condition



Abnormality in battery electronic control unit



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A70: 12V Low Voltage Generation condition



Battery electronic control unit power supply voltage (24 V system, stepped down to 12 V in high voltage battery box) is at or below the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Electronic control unit connector Inspection



18-46



02 : Electronic control unit power supply voltage



Electric circuit diagram



Circuit between high voltage battery box and battery



Other



• Inspection of battery and alternator (See Gr54.) • Replacement of high voltage battery box (internal circuit faulty)



18 P1A71: 12V Over Voltage Generation condition



Battery electronic control unit power supply voltage (24 V system, stepped down to 12 V in high voltage battery box) is at or above the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Electronic control unit connector Inspection



02 : Electronic control unit power supply voltage



Electric circuit diagram



Circuit between high voltage battery box and battery



Other



• Inspection of battery and alternator (See Gr54.) • Replacement of high voltage battery box (internal circuit faulty)



P1A72: Cooling Fan Failure Generation condition



Inconsistency between battery cooling fan operating signal and monitor signal



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



P1A73: Over Temp Warning Generation condition



High voltage battery temperature is at or above the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Inspection



This diagnosis code detects minor changes in condition. Inspection is not required since the condition returns to normal after some driving.



Other



P1A74: Cell Low Voltage Warning Generation condition



Minimum cell voltage (via cell controller) is at or below the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Inspection



This diagnosis code detects minor changes in condition. Inspection is not required since the condition returns to normal after some driving.



Other



P1A75: Low Voltage Warning Generation condition



High voltage battery total voltage is at or below the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Inspection



This diagnosis code detects minor changes in condition. Inspection is not required since the condition returns to normal after some driving.



Other



P1A76: Cell Over Voltage Warning Generation condition



Cell voltage (via cell controller) is at or above the specified value or abnormal.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Inspection



This diagnosis code detects minor changes in condition. Inspection is not required since the condition returns to normal after some driving.



Other



18-47



TROUBLESHOOTING P1A77: Over Voltage Warning Generation condition



High voltage battery total voltage is at or above the specified value.



Recoverability



Recovered if signal becomes normal with starter switch in ON position.



Control effected by electronic control unit



Charge and discharge temporarily inhibited (Upon recovery, hybrid electric vehicle system operation resumed)



Inspection



This diagnosis code detects minor changes in condition. Inspection is not required since the condition returns to normal after some driving.



Other



P1A78: EEPROM Failure Generation condition



Abnormality in battery electronic control unit



Recoverability



Recovered if signal becomes normal when starter switch is turned OFF to ON (power supply resumed to electronic control unit).



Control effected by electronic control unit



Transmission to each electronic control unit (controller area network communication) (Vehicle can run with hybrid electric vehicle system operation despite partial decline in function.)



Inspection



Replacement of high voltage battery box (internal circuit faulty)



Other



4. Freeze Frame Data of Multi-Use Tester • Freeze frame data is the value of service data at the generation of a diagnosis code. • Multiple freeze frame data related to the generated diagnosis code can be accessed on Multi-Use Tester. • For diagnostic criteria, see the table of service data.



18-48



18 5. Multi-Use Tester Service Data • It is possible to see service data and actuator tests simultaneously. No.



Item



Data



Inspection condition



Requirement



01 Battery Full Voltage



. V



READY indicator lamp illuminates



240 to 418 V



02 Battery Current



. A



Engine stopped READY indicator lamp illuminates



03 Battery Highest Temp



. °C



READY indicator lamp illuminates



04 Battery Lowest Temp



. °C



READY indicator lamp illuminates



0A –130 to 130 A Normal temperature to 65°C Normal temperature to 65°C



%



READY indicator lamp illuminates



20 to 70%



. %



READY indicator lamp illuminates



100 to 300%



05 SOC



.



06 SOH Battery Discharge Enable Power



.



kW



–



–



08 Battery Charge Enable Power



.



kW



–



–



07



09 Cell Average Voltage



. mV



READY indicator lamp illuminates



2700 to 4100 mV



0A Cell Highest Voltage



. mV



READY indicator lamp illuminates



2500 to 4250 mV



0B Highest Voltage Cell No.



.



0C Cell Lowest Voltage



. mV



0D Lowest Voltage Cell No.



.



– READY indicator lamp illuminates –



1 to 96 2500 to 4250 mV 1 to 96



*1: High voltage battery state of charge *2: High voltage battery state of health



6. Actuator Tests Performed Using Multi-Use Tester • It is possible to see service data and actuator tests simultaneously. No.



Item



A1 Cooling Fan Active



Explanation Battery cooling fan activated (automatic reset after 10 seconds)



Confirmation method Check with operation sound that cooling fan operates.



18-49



TROUBLESHOOTING 7. Inspections Performed at Electronic Control Unit Connectors • These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 , and so on) correspond to the similarly printed reference numbers in section “3. Inspections Based on Diagnosis Codes”.



7.1 Electronic control unit connector terminal layout



7.2 Inspection instructions • Inspections are performed with the connector removed because of the water and dust-proof connector. • Battery electronic control unit is checked at the connector of high voltage battery box.



CAUTION • Do not touch any terminal except those specified for the inspection. Be particularly careful not to cause short circuits between terminals using the tester probes.



Check item 01



Resistance of controller area network resistor



02



Power supply voltage of electronic control unit



Measurement method [Conditions] • Starter switch OFF • Disconnect engine electronic control unit from high voltage battery box at connector and check at vehicle side harness of high voltage battery box. [Requirements] Terminals: 7-8: 120 ± 6 Ω [Conditions] • Disconnect connector. Perform inspection on vehicle-side connector of high voltage battery box. [Requirements]



Terminals: 3-1 and 6-1: Approx. 24 V



Terminals: 2-1 • Starter switch ON: Approx. 24 V • Starter switch OFF: 0 V



[Conditions] • Starter switch OFF Continuity and insulation resistance of contactor • Disconnect connector. Perform inspection on vehicle-side connector of high voltage battery box. [Requirements]



Terminals: 9, 10 or 11-6: There is continuity.



Terminals: 9, 10 or 11-chassis ground: There is no continuity. 03



18-50



18 8. Possible Causes of Symptoms Warning lamp lights frequently during output limiting condition



Possible causes



• High-voltage system cooling system • Insufficient air bleeding • Insufficient coolant • Faulty water pump • Faulty blower motor • Clogged radiator • High-voltage battery box • Clogged air filter • Faulty battery cooling fan • Clogged air outlet of high-voltage battery box • Battery in high-voltage battery box expired (if service data No. 16: 59-1 is 300% or higher)



18-51



ON-VEHICLE INSPECTION AND ADJUSTMENT 1. Inspection of Coolant Level • Inspection should be performed before starting the engine when the coolant is cold. • Check that the coolant level in the reservoir tank is between “FULL” and “LOW” lines. • If the coolant level is below “LOW” line, check the cooling system for leakage. If no leakage is found, add coolant up to “FULL” line. Be sure to use the mixture of FUSO DIESEL LONG LIFE COOLANT and water in appropriate concentration to prevent freezing of the coolant and corrosion of the cooling system. (For details, see Owner’s Handbook.) • If the coolant level is extremely low or it lowers instantly after refilling, check the cooling system for leakage.



2. Inspection of Coolant Leakage • After driving, check the radiator, reservoir tank, water pump, water hose, motor electronic control unit, etc. for coolant leakage with the engine idling. • If any leakage is found, check the related parts for installation condition. If any loose part is found, tighten to the specified torque. If any cracked or damaged part is found, replace the part. (See the following.)



18-52



18 3. Coolant Replacement of High Voltage Cooling System Tightening torque (Unit: N·m {kgf·m}) Mark –



Parts to be tightened



Tightening torque



Remarks



Drain cock



1.0 ± 0.5 {0.1 ± 0.05}



–



Air bleeder



34.3 ± 4.9 {3.5 ± 0.5}



–



Lubricant and/or sealant Mark



Points of application



Specified lubricant and/or sealant



–



Cap fitting port in radiator



Engine coolant



–



Thread area of air bleeder



ThreeBond 1105



Quantity 5.3 dm3 {5.3 L} As required



: Reference value (Actually, coolant cannot be drained off completely.)



3.1 Positional relationship of high voltage cooling system



3.2 Draining • Remove the pressure cap of the radiator.



CAUTION • Drain the coolant only after it has cooled sufficiently to avoid getting scalded. • Opening the pressure cap while the coolant temperature is still high can cause hot coolant to spray out. Cover the cap with a cloth, and loosen it slowly to let the pressure out before opening it fully.



18-53



ON-VEHICLE INSPECTION AND ADJUSTMENT • Open the radiator drain cock to drain coolant around the radiator.



• Disconnect the water hose (between the motor electronic control unit and the motor generator) of the motor electronic control unit. • Coolant around the motor electronic control unit is drained. • To drain coolant in the motor generator, apply air pressure to the water pipe on the motor generator side.



18-54



18 3.3 Cleaning



CAUTION • Do not use hard water as it causes scaling and rust. Required properties of soft water Total hardness Sulfate SO –4 Chloride Cl– Total dissolved solids pH



300 ppm or less 100 ppm or less 100 ppm or less 500 ppm or less 6 to 8



• Using the radiator for extended periods of time without cleaning can increase chance of rust and scale formation, which may cause poor cooling. The cooling system must be cleaned periodically. • In cases where a great amount of rust has accumulated it is common for the radiator to leak as a result of cleaning. Conduct a through check for leakage after cleaning. • Reinstall the drain cock and water pipe removed in Section 3.2. • Connect Multi-Use Tester. (See Gr00.) • Select an appropriate cleaning method according to the condition of the cooling system as shown below. • •



•



Ordinary condition



•



Coolant extremely dirty



•



Radiator clogged



Cleaning using FUSO RADIATOR CLEANER (RADIPET-7). Flushing with water. Make water solution of FUSO RADIATOR CLEANER (RADIPET-7) at 5 to 10% concentration in volume. Pour solution into the radiator from the pressure cap fitting port. Perform actuator test No. A7 “Water Pump ON” (automatically terminated in 10 minutes) once.



CAUTION •



Limit the engine idling period to one hour. Operating an engine containing the cleaning solution for longer time may lead to damage of the cooling system.



Drain out coolant. (See section 3.2.)



Pour tap water into the radiator from the pressure cap fitting port. Perform actuator test No. A7 “Water Pump ON” (automatically terminated in 10 minutes) once. Drain out water. (See section 3.2.) Cleaning is complete if drained water is clear. Repeat procedure if drained water is not clear.



CAUTION •



After cleaning the cooling system using cleaning solution, fill it with coolant as soon as possible.



18-55



ON-VEHICLE INSPECTION AND ADJUSTMENT 3.4 Filling and air bleeding • After draining the coolant (or tap water if used for cleaning), fit the drain cock. • Disconnect the water hose and remove the air bleeder on top of the motor generator.



• Turn up the end of the water hose. • Pour coolant from the pressure cap port while performing actuator test No. A7 “Water pump ON” (automatically terminated in 10 minutes).



CAUTION • To prevent freezing of the coolant and corrosion of the cooling system, be sure to use the mixture of FUSO DIESEL LONG LIFE COOLANT and water with appropriate concentration. (See Owner’s Handbook for details.) • When coolant comes out from the water hose, connect the water hose to the water pipe.



CAUTION • If the end of the water hose is not turned up, a large amount of air may be trapped in the motor electronic control unit. • When coolant comes out from the air bleeder port, fit the air bleeder. • Pour the coolant up to the pressure cap port. • Perform actuator test No. A7 “Water Pump ON” (automatically terminated in 10 minutes) twice so that coolant circulates through the cooling system for a total of 20 minutes for air bleeding. • If the coolant level at the pressure cap port lowers, pour the additional coolant until the radiator is filled with coolant up to the brim of the pressure cap port. Then, fit the pressure cap. • Remove the cap from the reservoir tank and pour coolant into it up to the “FULL” line.



18-56



18 4. Inspection of Air Filter in High Voltage Battery Box Lubricant and/or sealant Mark –



Points of application Cover contact surface with high voltage battery box



Specified lubricant and/or sealant



Quantity



Shinetsu Silicones KE45T or Service Kit B (Part No. MK443503)



As required



[Removal] • Remove the cover. • Remove the air filter by pulling it out while lifting it.



[Inspection] • Check the air filter and clean it if it is dirty. [Cleaning] • Clean with water. • If dirt cannot be removed with water, replace the air filter. [Installing] • Insert the air filter horizontally. • Fit the air filter into the edge of the high voltage battery box to install it.



• Apply sealant to the contact surface of the cover with the high voltage battery box and install the cover.



18-57



HIGH VOLTAGE COOLING SYSTEM



Removal sequence 1 2 3 4 5 6 7 8 9



Water hose Water hose Water hose Water hose Stay Protector Water hose Reservoir tank Tank bracket



10 11 12 13 14 15 16 17 18



Pump cover (bottom) Pump cover (rear) Pump cover (middle) Water hose Water pump Rod Blower motor Radiator support Bush



19 Radiator 20 Bush 21 Radiator holder



*a:



Clutch housing & motor generator b: Motor electronic control unit c: Frame



* *



• Install each hose clamp to the angle indicated in the illustration so that sufficient clearance is assured between the hose clamp and its surrounding parts.



WARNING • Do not spill coolant on any high voltage device or the high voltage cable. If spilt, wipe it off securely.



Installation sequence Follow the removal sequence in reverse.



18-58



18 Work before installation Draining of coolant • Perform draining of coolant in the high voltage cooling system. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



Installation procedure Installation: Water hose • Connect the water hose with the pipe fixing the hose end at the spool center or white paint center. (If the hose is properly connected, the measurement indicated in the illustration is 30 ± 3 mm.) • If the pipe has no white paint, install the water hose so that the measurement indicated in the illustration becomes 30 ± 3 mm.



Work after installation Refilling of coolant • After installing the devices and pipes of the high voltage cooling system, refill coolant. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)



18-59



HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT



Removal sequence 1 Safety plug cover & packing 2 Safety plug 3 High voltage cable (between high voltage battery box and motor electronic control unit) 4 Connector cover 5 High voltage cable (between motor electronic control unit and motor generator)



18-60



6 7 8 9 10 11



Clevis pin Strap & packing High voltage battery box Box bracket (middle) Motor electronic control unit Motor electronic control unit support (upper) 12 Motor electronic control unit support (lower)



13 14 15 16



*a: *



Box bracket (front) Box bracket (rear) Cable bracket Base bracket



Clutch housing & Motor generator b: Frame



18 WARNING • Make sure that the insulated gloves are not cracked, ripped, broken or damaged and not wet before use. • High voltage devices have magnetic parts. Do not carry metal parts in your pockets that can induce short circuit if dropped. Do not work wearing what can be affected by magnetism, such as magnetic card and wrist watch. • A mechanic who has a pacemaker or any other electronic medical devices can work on the hybrid electric vehicle without being affected. (Magnetic force is almost equal to that of ordinary vehicles.) • Before inspection and maintenance involving the high voltage circuit, put up a sign “Do Not Touch. High Voltage Work In Progress” or the like at the working place and the driver’s seat to warn other workers. • To avoid the risk of failure, do not disassemble high voltage devices (except removal of the high voltage battery box safety plug and air filter).



Installation sequence Follow the removal sequence in reverse. Repair kit: Service Kit A (Part No.: MK443502), Service kit C (Part No.: MK443504)



Service standards Location



Maintenance item



*a



Limit



Remedy



Above 10 MΩ (at DC 500 V)



–



Replace



Between high voltage cable and inner peripheral aluminum part



3, 5



10



Standard value



Insulation resistance



Between motor electronic control unit (+ and –) and chassis ground or case Between motor electronic control unit (U, V and W) and chassis ground or case Between motor generator (U, V and W) and chassis ground or case



Tightening torque (Unit: N·m {kgf·m}) Mark



Parts to be tightened Bolt (installation of safety plug cover & packing)



Tightening torque



Remarks



6.2 ± 0.5 {0.6 ± 0.05}



–



18-61



HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT Work before removal Maintenance workflow • The way to handle high voltage devices differs depending on presence/absence of diagnosis codes and, if issued, on the type of the diagnosis code. Before working, see the following chart to grasp a general idea of handling procedures. Start the engine and shift the shift lever from N to D. After 5 seconds or longer, check hybrid electric vehicle warning lamp. ON OFF



Turn starter switch to OFF. After 35 seconds passed, start the engine and shift the shift lever from N to D again. After 5 seconds or longer, check hybrid electric vehicle warning lamp. ON OFF



Type of diagnosis code Code indicating electric Code indicating hazard leakage



Code indicating minor hazard



Wear insulated gloves.



Remove safety plug with starter switch OFF (safety plug cover kept attached).



After one hour passed, measure voltage between direct current high voltage terminals of motor electronic control unit. Above 36 V At or below 36 V



Maintenance without insulated gloves is allowed.



Perform each work.



Maintenance is finished by attaching safety plug.



Removal: High voltage cooling system • Remove the water hose in high voltage cooling system. (See “HIGH VOLTAGE COOLING SYSTEM”.)



WARNING • Do not spill coolant on any high voltage device or the high voltage cable. If spilt, wipe it off securely. Preparation • Apply chocks to the front and rear wheels to prevent the vehicle from moving. • Start the engine and shift the shift lever from N to D. After 5 seconds or longer, check that the hybrid electric vehicle warning lamp is off (the hybrid electric vehicle system is normal).



18-62



18



• Turn the starter switch to OFF.



• Turn the starter switch to OFF. After 35 seconds passed, start the engine and shift the shift lever from N to D. • After 5 seconds or longer, check the hybrid electric vehicle warning lamp for its on/off status. If it is ON, refer to the corresponding diagnosis code. (See Gr00.) • Turn the starter switch to OFF. • After turning the starter switch to OFF, pull out the key and keep it to prevent other workers from carelessly turning the starter switch to ON.



DANGER • When the diagnosis codes listed below occur, work with insulated gloves since high voltage may still remain. Code



Message



Flashes



P0A1B



CPU Failure



28



P0AA1



Main Contactor P&N Welded



09



P0AA6



Leak



65



P0AD9



Main Contactor Driver Failure



08



P0AE2



Precharge Contactor Welded



37



P1A04



Smooth Capacitor Discharge Fail



07



P1A10



P1A04 happens



40



Removal procedure Removal: Safety plug • Slide the lever of the safety plug upward.



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HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT • Pull the lever of the safety plug and rotate it 90 degrees. • Remove the safety plug from the high voltage battery box by pulling it out. • Install the safety plug cover & packing to prevent foreign substances and water from mixing. • Keep the safety plug to prevent other workers from carelessly installing it. • During preparation, if a diagnosis code that indicates possible remaining of high voltage (except P0AA6 (65): Leak) occurs, wait for an hour and resume the work.



WARNING • If the diagnosis code P0AA6 (65): Leak occurs, residual voltage will remain in the high voltage circuit and motor electronic control unit even after an hour passed. In this case, work with insulated gloves on without waiting for an hour.



Removal: High voltage cable (between high voltage battery box and motor electronic control unit) • While pushing in the arm, remove the high voltage cable by pulling out the female connector. • Make the device side and high voltage cable side terminals watertight and dust-tight with tape.



• During preparation, if a diagnosis code that indicates possible remaining of high voltage (except P0AA6 (65): Leak) occurs, measure voltage between the direct current high voltage terminals of the motor electronic control unit and make sure that the voltage is below 36 V. If this is the case, you can proceed with the work without wearing insulated gloves.



WARNING • If the diagnosis code P0AA6 (65): Leak occurs, residual voltage remains in the high voltage circuit and motor electronic control unit. In this case, do all the work with insulated gloves on without measuring voltage. Removal: High voltage cable (between motor electronic control unit and motor generator) • While pushing in the arm, remove the high voltage cable by pulling out the female connector. • Make the device side and high voltage cable side terminals watertight and dust-tight with tape.



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18 Inspection procedure Inspection: Insulation resistance • Measure insulation resistance between the high voltage terminal and inner peripheral aluminum part inside each high voltage cable. Use an insulation tester whose range is wider than 1000 V. • If the measured value deviates from the standard value, replace the high voltage cable.



• Measure insulation resistance between each high voltage terminal of the motor electronic control unit and the chassis ground (if provided on the vehicle). Use an insulation tester whose range is wider than 1000 V. • The outside surface (aluminum part) of the connector on the motor electronic control unit side is for shielding. The inner connector is the high voltage terminal.



WARNING • Be sure to remove the high voltage cable before inspection. • If the measured value deviates from the standard value, replace the motor electronic control unit. • Measure insulation resistance between each high voltage terminal of the motor generator and the chassis ground (if provided on the vehicle). Use an insulation tester whose range is wider than 1000 V. • The outside surface (aluminum part) of the connector on the motor generator side is for shielding. The inner connector is the high voltage terminal.



WARNING • Be sure to remove the high voltage cable before inspection. • If the measured value deviates from the standard value, replace the clutch housing & motor generator. (See Gr22.)



Replacement procedure Replacement: High voltage battery box • If the high voltage battery box is replaced for failure, leave the safety plug of the abnormal high voltage battery box removed and perform insulating treatment to the high voltage terminals to avoid accidents such as electric shock.



DANGER • Since high voltage is not discharged even if the box is left as it is for a long time, it is possible to receive an electric shock if someone touches the high voltage terminals by mistake.



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HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT WARNING • Do not disassemble the high voltage battery box. • Leave the safety plug cover & packing installed so that the safety plug connecting terminals are not exposed.



Installation procedure Installation: Strap and packing • Apply soapy water on the rubber section of each strap and packing where it contacts with the battery box. Then install each strap and packing by aligning it with the center of the box bracket.



Installation: High voltage cable (between high voltage battery box and motor electronic control unit) • Insert the high voltage cable until a click is heard. • Check that the cable is installed securely by lightly pulling the female connector.



Installation: Safety plug • Check that the starter switch is OFF and all the high voltage devices, high voltage cables and 24 V wiring are correctly connected.



WARNING • Make sure that no other workers are performing maintenance on high voltage devices.



• Insert the safety plug into the terminal part securely. Then, push in the lever and rotate it 90 degrees.



CAUTION • If the lever is forcibly rotated before adequately inserted, it can be broken. • Slide the lever of the safety plug downward until it locks.



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18 Work after installation Hybrid electric vehicle system activation • Turn the starter switch to ON and check that the READY indicator lamp on the meter cluster illuminates. • If the READY indicator lamp does not illuminate, the hybrid electric vehicle system is faulty. Perform troubleshooting to deal with the fault. In addition, if diagnosis code P1A66 (75): “Voltage Sensor Failure” occurs, the safety plug may not be properly installed. Reinstall the safety plug.



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INSPECTION OF ELECTRICAL EQUIPMENT #042 Inspection of stop lamp switch Switch position



Continuity terminal



OFF



–



ON



1–2



• If any fault is found, replace the switch.



#302 Inspection of brake fluid pressure sensor • Apply voltage 5 volts DC between terminals 1 and 3. • Measure the output voltage generated between terminals 2 and 3. Standard value



0.5 V



• If the measurement is not within the range of the standard value, replace the sensor.



#437 Inspection of motor generator • Remove the high voltage cable. (See “HIGH VOLTAGE CABLE, HIGH VOLTAGE BATTERY BOX AND MOTOR ELECTRONIC CONTROL UNIT”.)



• Measure values of resistance between the following terminals. Revolution sensor Standard Alternating current power value (20°C) supply system (U–V) Alternating current power supply system (V–W) Alternating current power supply system (W–U)



1–4



30.2 ± 6.0 Ω



3–8



33.8 ± 6.8 Ω



2–7



12.3 ± 2.5 Ω



U–V V–W



0.028 ± 0.003 Ω



W–U



• Measure value of resistance between terminals 5 and 6.



Standard value



0°C



144.0 to 182.5 kΩ



5°C



112.3 to 140.8 kΩ



10°C



88.2 to 109.5 kΩ



15°C



69.8 to 85.8 kΩ



20°C



55.7 to 67.8 kΩ



25°C



44.7 to 53.9 kΩ



30°C



36.1 to 43.2 kΩ



• If the measured value deviates from the standard value, replace the clutch housing & motor generator. (See Gr22.)



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18 #495 Inspection of blower motor • Make sure that the fan operates when 24 volts DC is applied between terminals 1 and 2. • If any fault is found, replace the motor.



#768 Inspection of water pump • Perform the following checks, and if any fault is found, replace the water pump.



• Connect the hose to the OUT port. Put the IN side in a waterfilled container and the OUT side in an empty container. • Apply voltage 24 volts DC between terminals 1 and 2. • Measure the quantity of water discharged from the OUT side. Standard value (at 10 kPa {0.1 kgf/cm2} (1 m))



Above approx. 20 dm3 {20 L}/min.



• Put the IN side in a water-filled container. • Apply voltage 24 volts DC between terminals 1 and 2 and check that the operating sound is heard.



CAUTION • Do not operate the water pump without water being circulated to avoid malfunction.



#828 Inspection of controller area network resistor • Measure the resistance between terminals 1 and 2. Standard value (at 20°C)



120 ± 6 Ω



• If the measured value is out of the standard value, replace the resistor.



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INSTALLED LOCATIONS OF PARTS



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INSTALLED LOCATIONS OF PARTS



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ELECTRIC CIRCUIT DIAGRAM



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NOVEMBER 2009 512 (H)